Low power, multi-chip diversity architecture
View Patent ↗A multi-chip antenna diversity architecture includes a first receiver chip including a first tuner, and a first demodulator directly connected to the tuner. The first demodulator demodulates the first input signal received from the first tuner. A first power sequencer that controls the first receiver chip, and a first chip ID including a voltage source V SS that indicates the first receiver chip as a slave chip. A second receiver chip includes a second tuner, and a second demodulator directly connected to the second tuner. The second demodulator demodulates the second input signal received from the second tuner. A second diversity combiner directly connected to the second demodulator. A second chip ID includes a voltage source V DD that indicates the second receiver chip as a master chip. A Diversity State Machine (DSM) controls an operating state of the first receiver chip and the second receiver chip that are structurally identical.
1. A multi-chip antenna diversity architecture comprising:
a first receiver chip that receives a first input signal from a first antenna, said first receiver chip comprising:
a first tuner that amplifies said first input signal;
a first demodulator directly connected to said tuner, wherein said first demodulator demodulates said first input signal received from said first tuner;
a first diversity combiner operatively connected to said first demodulator;
a first power sequencer that controls said first receiver chip; and
a first chip ID comprising a voltage source V SS that indicates said first receiver chip as a slave chip;
a second receiver chip that receives a second input signal from a second antenna, said second receiver chip comprising:
a second tuner that amplifies said second input signal;
a second demodulator directly connected to said second tuner, wherein said second demodulator demodulates said second input signal received from said second tuner;
a second diversity combiner directly connected to said second demodulator, wherein said second diversity combiner receives diversity data from said first demodulator and receives the demodulated second input signal from said second demodulator;
a second chip ID comprising a voltage source V DD that indicates said second receiver chip as a master chip; and
a Diversity State Machine (DSM) that receives signal statistics from said first demodulator and said second demodulator, wherein said DSM controls an operating state of said first receiver chip and said second receiver chip,
wherein said first receiver chip and said second receiver chip are structurally identical.
2. The multi-chip antenna diversity architecture of claim 1 , wherein said DSM transmits a command to said slave chip to power down using a general purpose input-output switch (GPIOX) available on said first receiver chip and said second receiver chip.
3. The multi-chip antenna diversity architecture of claim 2 , wherein said slave chip is powered ON upon said GPIOX being set to V DD .
4. The multi-chip antenna diversity architecture of claim 2 , wherein said slave chip is powered OFF upon said GPIOX being set to V SS .
5. The multi-chip antenna diversity architecture of claim 1 , wherein said DSM automatically power downs either said master chip or said slave chip depending upon channel conditions.
6. The multi-chip antenna diversity architecture of claim 1 , wherein said first demodulator transmits diversity data and signal statistics to said second receiver chip.
7. A method of operating a multi-chip antenna diversity architecture to optimize antenna diversity and power consumption based on channel conditions, said method comprising:
receiving a first input signal in a master chip comprising a chip pin operatively connected to V DD ;
receiving a second input signal in a slave chip comprising a chip pin operatively connected to V SS ,
powering ON said master chip and said slave chip when a value of at least one channel metric of said multi-chip antenna diversity architecture is below a threshold value; and
powering OFF said master chip or said slave chip when said value of said channel metrics of said multi-chip antenna diversity architecture exceeds said threshold value.
8. The method of claim 7 , wherein any of said master chip and said slave chip is powered OFF if said channel conditions allow for at least one of said master chip and said slave chip to receive error free audio/video data.
9. The method of claim 8 , wherein said channel conditions comprise any of said SNR, a bit error rate (BER), a packet error rate (PER), and a received signal strength indication (RSSI).
10. The method of claim 8 , further comprising using a Diversity State Machine (DSM) to automatically power down any of said master chip and said slave chip.