Method and apparatus for transceiving for beam forming in wireless communication system
An electronic device for beamforming and a method thereof in a wireless communication system are provided. The electronic device includes a plurality of antennas. The electronic device also includes a plurality of transmitter and receiver switches connected to the antennas and configured to select a plurality of transmission paths and a plurality of reception paths. The electronic device further includes a plurality of first Phase Shifters (P/Ss) configured to shift a phase of Radio Frequency (RF) signals received via the antennas and the transmitter and receiver switches. The electronic device includes a combiner configured to combine the phase-shifted RF signals to one RF signal. The electronic device also includes a quadrature signal generator configured to generate a quadrature signal. The electronic device further includes a down-mixer configured to convert the quadrature signal and the combined RF signal to a first baseband signal and configured to output the first baseband signal to a modem. The electronic device includes a controller configured to control the transmitter and receiver switches, the first P/Ss, and a plurality of second P/Ss to determine a transmission or reception mode of the transmitter and receiver switches, and the phase of the RF signals transmitted and received.
1. A receiver comprising:
a plurality of switches connected to a plurality of antennas and configured to connect the plurality of antennas to a plurality of reception paths;
a plurality of Phase Shifters (P/Ss) configured to shift a phase of each of a plurality of Radio Frequency (RF) signals received via the plurality of reception paths;
a combiner configured to combine the plurality of phase-shifted RF signals to one RF signal;
a quadrature signal generator configured to generate differential I/Q (inphase and quadrature) signals for converting the combined RF signal to a baseband signal; and
a down-mixer configured to:
convert the combined RF signal to the baseband signal using the differential I/Q signals, and
output the baseband signal to a modem.
2. The receiver of claim 1 , wherein the quadrature signal generator comprises:
a synthesizer configured to generate a local signal having a frequency f LO /M;
a frequency multiplier configured to multiply the frequency f LO /M of the local signal by a value M, wherein the value M is a natural number;
a 4-way divider configured to divide the local signal having a frequency f LO into four local signals;
a first High Pass Filter (HPF) and a first Low Pass Filter (LPF) each configured to generate a phase difference of 90 degrees between a first local signal and a second local signal;
a first set of amplifiers configured to convert the first local signal and the second local signal each having a phase difference of 90 degrees to a first set of differential signals;
a second HPF and a second LPF each configured to generate a phase difference of 90 degrees between a third local signal and a fourth local signal; and
a second set of amplifiers configured to convert the third local signal and the fourth local signal each having a phase difference of 90 degrees to a second set of differential signals.
3. The receiver of claim 1 , wherein the quadrature signal generator comprises:
a synthesizer configured to generate a local signal having a frequency (M*f LO );
a frequency divider configured to divide the frequency (M*f LO ) of the local signal by value M, wherein the value M is a natural number;
a 4-way divider configured to divide the local signal having a frequency f LO into four local signals;
a first High Pass Filter (HPF) and a first Low Pass Filter (LPF) each configured to generate a phase difference of 90 degrees between a first local signal and a second local signal;
a first set of amplifiers configured to convert the first local signal and the second local signal each having a phase difference of 90 degrees to a first set of differential signals;
a second HPF and a second LPF each configured to generate a phase difference of 90 degrees between a third local signal and a fourth local signal; and
a second set of amplifiers configured to convert the third local signal and the fourth local signal each having a phase difference of 90 degrees to a second set of differential signals.
4. The receiver of claim 1 , wherein the combiner is formed by a combination of at least one N-way combiner, and wherein N is a natural number greater than 2.
5. A method implemented by receiver, the method comprising:
connecting, at a plurality of switches, a plurality of antennas to a plurality of reception paths, when receiving a plurality of Radio Frequency (RF) signals from the plurality of antennas;
shifting, at a first set of Phase Shifters (P/Ss), a phase of each of the plurality of RF signals received via the plurality of reception paths;
combining, at a combiner, the plurality of phase-shifted RF signals to one RF signal;
generating, at a quadrature signal generator, differential I/O (inphase and quadrature) signals for converting the combined RF signal to a baseband signal;
converting, at a down mixer, the combined RF signals the baseband signal; and
outputting the baseband signal to a modem.
6. The method of claim 5 , wherein generating differential I/Q signals comprises:
generating a local signal having a frequency f LO /M;
multiplying the frequency f LO /M of the local signal by an M value, wherein the M value is a natural number;
dividing the local signal having a frequency f LO into four local signals;
generating a phase difference of 90 degrees between a first local signal and a second local signal;
converting the first local signal and the second local signal each having a phase difference of 90 degrees to a first set of differential signals;
generating a phase difference of 90 degrees between a third local signal and a fourth local signal; and
converting the third local signal and the fourth local signal each having a phase difference of 90 degrees to a second set of differential signals a signal generator for generating the quadrature signal.
7. The method of claim 5 , wherein generating differential I/Q signals comprises:
generating a local signal having a frequency (M*f LO );
dividing the frequency (M*f LO ) of the local signal by an M value, wherein the M value is a natural number;
dividing the local signal having a frequency f LO into four local signals;
generating a phase difference of 90 degrees between a first local signal and a second local signal;
converting the local signal and the second local signal each having a phase difference of 90 degrees to a first set of differential signals;
generating a phase difference of 90 degrees between a third local signal and a fourth local signal; and
converting the third local signal and the fourth local signal each having a phase difference of 90 degrees to a second set of differential signals.
8. The receiver of claim 1 , wherein the receiver further comprises:
a plurality of Low Noise Amplifiers (LNAs) configured to connect between the plurality of switches and the plurality of first P/Ss.
9. The method of claim 5 , further comprises:
before shifting a phase of each of the plurality of RF signals received via the plurality of reception paths, low-noise amplifying, at a plurality of Low Noise Amplifiers (LNAs), the plurality of RF signals.
10. A transmitter comprising:
a quadrature signal generator configured to generate differential I/Q (inphase and quadrature) signals for converting a baseband signal received from a modem to an RF signal;
an up-mixer configured to convert the baseband signal to the RF signal using the differential I/Q signals;
a divider configured to divide the RF signal into a plurality of RF signals;
a plurality of Phase Shifters (P/Ss) configured to shift a phase of each of the plurality of RF signals; and
a plurality of switches connected to a plurality of antennas and configured to transmit the plurality of phase-shifted RF signals to the plurality of antennas.
11. The transmitter of claim 10 , wherein the quadrature signal generator comprises:
a synthesizer configured to generate a local signal having a frequency f LO /M;
a frequency multiplier configured to multiply the frequency f LO /M of the local signal by an M value, wherein the M value is a natural number;
a 4-way divider configured to divide the local signal having a frequency f LO into four local signals;
a first High Pass Filter (HPF) and a first Low Pass Filter (LPF) configured to generate a phase difference of 90 degrees between a first local signal and a second local signal;
a first set of amplifiers configured to convert the first local signal and the second local signal having a phase difference of 90 degrees to a first set of differential signals;
a second High Pass Filter (HPF) and a second Low Pass Filter (LPF) configured to generate a phase difference of 90 degrees between a third local signal and a fourth local signal; and
a second set of amplifiers configured to convert the third local signal and the fourth local signal having a phase difference of 90 degrees to a second set of differential signals.
12. The transmitter of claim 10 , wherein the quadrature signal generator comprises:
a synthesizer configured to generate a local signal having a frequency (M*f LO );
a frequency divider configured to divide the frequency (M*f LO ) of the local signal by an M value, wherein the M value is a natural number;
a 4-way divider configured to divide the local signal having a frequency f LO into four local signals;
a first High Pass Filter (HPF) and a first Low Pass Filter (LPF) configured to generate a phase difference of 90 degrees between a first local signal and a second local signal;
a first set of amplifiers configured to convert the first local signal and the second local signal having a phase difference of 90 degrees to a first set of differential signals;
a second High Pass Filter (HPF) and a second Low Pass Filter (LPF) configured to generate a phase difference of 90 degrees between a third local signal and a fourth local signal; and
a second set of amplifiers configured to convert the third local signal and the fourth local signal having a phase difference of 90 degrees to a second set of differential signals.
13. The transmitter of claim 10 , wherein the quadrature signal generator comprises:
a local oscillator configured to generate a local signal having a frequency f LO ;
a 4-way divider configured to divide the local signal into four local signals;
a first High Pass Filter (HPF) and a first Low Pass Filter (LPF) configured to generate a phase difference of 90 degrees between a first local signal and a second local signal;
a first set of amplifiers configured to convert the first local signal and the second local signal having a phase difference of 90 degrees to a first set of differential signals;
a second High Pass Filter (HPF) and a second Low Pass Filter (LPF) configured to generate a phase difference of 90 degrees between a third local signal and a fourth local signal; and
a second set of amplifiers configured to convert the third local and the fourth local signal having a phase difference of 90 degrees to a second set of differential signals.
14. The transmitter of claim 10 , wherein the transmitter further comprises:
a plurality of Power Amplifiers (PAs) configured to amplify the plurality of phase-shifted RF signals.
15. A method implemented using a transmitter, the method comprising:
generating, at a quadrature signal generator, differential I/Q (inphase and quadrature) signals for converting a baseband signal received from a modem to an RF signal;
converting, at an up-mixer, the baseband signal to the RF signal using the differential I/Q signals;
dividing, at a divider, the RF signal into a plurality of RF signals;
shifting, at a plurality of Phase Shifters (P/Ss), a phase of each of the plurality of RF signals; and
transmitting, at a plurality of switches connected to a plurality of antennas, the plurality of phase-shifted RF signals to the plurality of antennas.
16. The method of claim 15 , wherein generating the differential I/Q signals comprises:
generating a local signal having a frequency f LO /M;
multiplying the frequency f LO /M of the local signal by an M value, wherein the M value is a natural number;
dividing the local signal having a frequency f LO into four local signals;
generating a phase difference of 90 degrees between a first local signal and a second local signal;
converting the first local signal and the second local signal having a phase difference of 90 degrees to a first set of differential signals;
generating a phase difference of 90 degrees between a third local signal and a fourth local signal; and
converting the third local signal and the fourth local signal having a phase difference of 90 degrees to a second set of differential signals.
17. The method of claim 15 , wherein generating the differential I/Q signals comprises:
generating a local signal at a frequency (M*f LO );
dividing the frequency (M*f LO ) of the local signal by an M value, wherein the M value is a natural number;
dividing the local signal having a frequency f LO into four local signals;
generating a phase difference of 90 degrees between a first local signal and a second local signal;
converting the first local signal and the second local signal having a phase difference of 90 degrees to a first set of differential signals;
generating a phase difference of 90 degrees between a third local signal and a fourth local signal; and
converting the third local signal and the fourth local signal having a phase difference of 90 degrees to a second set of differential signals.
18. The method of claim 15 , wherein generating the differential I/Q signals comprises:
generate a local signal having a frequency f LO ;
dividing the local signal having a frequency f LO into four local signals;
generating a phase difference of 90 degrees between a first local signal and a second local signal;
converting the first local signal and the second local signal having a phase difference of 90 degrees to a first set of differential signals;
generating a phase difference of 90 degrees between a third local signal and a fourth local signal; and
converting the third local signal and the fourth local signal having a phase difference of 90 degrees to a second set of differential signals.
19. The method of claim 15 , wherein the method further comprises:
amplifying, at a plurality of Power Amplifiers (PAs), the plurality of phase-shifted RF signals.
20. The receiver of claim 1 , wherein the quadrature signal generator comprises:
a local oscillator configured to generate a local signal having a frequency f LO ;
a 4-way divider configured to divide the local signal into four local signals;
a first High Pass Filter (HPF) and a first Low Pass Filter (LPF) each configured to generate a phase difference of 90 degrees between a first local signal and a second local signal;
a first set of amplifiers configured to convert the first local signal and the second local signal each having a phase difference of 90 degrees to a first set of differential signals;
a second HPF and a second LPF each configured to generate a phase difference of 90 degrees between a third local signal and a fourth local signal; and
a second set of amplifiers configured to convert the third local signal and the fourth local signal each having a phase difference of 90 degrees to a second set of differential signals.
21. The method of claim 5 , wherein generating differential I/Q signals comprises:
generating a local signal having a frequency f LO ;
dividing the local signal having the frequency f LO into four local signals;
generating a phase difference of 90 degrees between a first local signal and a second local signal;
converting the first local signal and the second local signal each having a phase difference of 90 degrees to a first set of differential signals;
generating a phase difference of 90 degrees between a third local signal and a fourth local signal; and
converting the third local signal and the fourth local signal each having a phase difference of 90 degrees to a second set of differential signals.