Arrangement for concurrent detection of signals in a receiver
An arrangement for detection of multiple signals concurrently is disclosed. The arrangement includes a demodulator component, a mixer and a detector. The demodulator component is configured to demodulate or obtain one or more components from a received signal. The mixer is configured to mix the one or more components into a folded signal using a plurality of varied local oscillator (LO) signals. The detector is configured to identify a valid signal within the folded signal and to initiate a response for the identified valid signal.
1. An arrangement for concurrent scanning of a plurality of channels, the arrangement comprising:
a generator configured to generate one or more components from a received signal, wherein the received signal comprises the plurality of channels;
a mixer configured to mix the one or more components into a folded signal based on a plurality of local oscillator (LO) signals; and
a detector configured to concurrently scan the plurality of channels to detect a signal within the folded signal based on a predetermined set of criteria and to initiate a response based on the detected signal.
2. The arrangement of claim 1 , further comprising a LO signal generator configured to generate the plurality of LO signals based on the plurality of channels.
3. The arrangement of claim 2 , wherein the plurality of channels include Bluetooth low energy (BLE) and Zigbee (ZB).
4. The arrangement of claim 1 , wherein the mixer includes four pairs of mixers, each pair configured to utilize one of the plurality of LO signals.
5. The arrangement of claim 1 , wherein the arrangement includes a low noise amplifier configured to amplifier the received signal and provide the received signal to the generator component.
6. The arrangement of claim 1 , wherein the generator is a quadrature generator.
7. The arrangement of claim 1 , wherein the mixer is configured to generate a plurality of mixed signals using the plurality of LO signals to downconvert the one or more components.
8. The arrangement of claim 7 , wherein the mixer includes a summation component configured to fold the plurality of mixed signals into the folded signal.
9. The arrangement of claim 1 , wherein the plurality of LO signals are combined into a single, multi-frequency LO signal.
10. The arrangement of claim 1 , wherein the detector includes an address correlator configured to identify a valid signal and associated address from the folded signal, wherein the valid signal is the detected signal.
11. The arrangement of claim 1 , wherein the detector includes a preamble detector configured to identify a valid signal based on a detected preamble of the folded signal, wherein the valid signal is the detected signal.
12. An apparatus comprising:
an oscillator configured to generate a primary oscillator signal based on a predetermined frequency of a plurality of channels and to generate a plurality of local oscillator (LO) signals from the primary oscillator signal based on the plurality of channels, wherein the predetermined frequency is a multiple of a highest frequency of the plurality of channels;
a mixer configured to generate a plurality of mixed signals based on signal components from a received signal and the plurality of LO signals and to combine the mixed signals into a combined signal;
a channel select filter configured to filter the combined signal based on the plurality of channels and provide a filtered output signal, wherein the filtered output signal comprises signals from the plurality of channels; and
a detector configured to concurrently scan the plurality of channels to detect a presence of a signal within the filtered output signal of the plurality of channels.
13. The apparatus of claim 12 , wherein the signal components include an in phase component.
14. The apparatus of claim 12 , further comprising a multi-frequency mixer configured to combine the plurality of LO signals into a single multi-frequency LO signal.
15. The apparatus of claim 14 , wherein the mixer utilizes the single multi-frequency LO signal.
16. A method of concurrently scanning a plurality of channels, the method comprising:
receiving a signal using a plurality of channels;
generating quadrature and in phase components from the received signal;
mixing the quadrature component with one or more local oscillator signals to generate one or more mixed quadrature signals;
mixing the in phase component with the one or more local oscillator signals to generate one or more mixed in phase signals;
combining the one or more mixed quadrature signals into a folded quadrature signal;
combining the one or more mixed in phase signals into a folded in phase signal;
combining the folded quadrature signal and the folded in phase signal into a folded signal; and
detecting a signal within the folded signal based on a predetermined set of criteria.
17. The method of claim 16 , further comprising detecting a valid signal within the folded signal, wherein the valid signal is the detected signal.
18. The method of claim 17 , further comprising generating an event in response to detecting the valid signal.
19. The method of claim 16 , wherein the one or more LO signals is a single multi-frequency LO signal.
20. The arrangement of claim 1 , wherein the criteria is channel strength.