Amplitude and phase matching for layered modulation reception
First Claim
1. A method of receiving layered modulation signals, comprising:
- receiving a layered modulation signal including an upper layer signal and a lower layer signal;
demodulating and decoding the upper layer signal from the received layered modulation signal;
estimating an upper layer amplitude factor and an upper layer phase factor from the received layered modulation signal;
reconstructing a substantially ideal upper layer signal from the demodulated and decoded upper layer signal including matching an ideal amplitude and an ideal phase by applying the upper layer amplitude factor and the upper layer phase factor to the reconstructed ideal upper layer signal;
subtracting the reconstructed ideal upper layer signal from the received layered modulation signal to produce the lower layer signal for processing.
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Abstract
An apparatus and method for receiving layered modulation signals is disclosed. A typical method includes receiving a layered modulation signal including an upper layer signal and a lower layer signal, demodulating and decoding the upper layer signal from the received layered modulation signal, estimating an upper layer amplitude factor and an upper layer phase factor from the received layered modulation signal. A substantially ideal upper layer signal is reconstructed from the demodulated and decoded upper layer signal including matching an ideal amplitude and an ideal phase by applying the upper layer amplitude factor and the upper layer phase factor to the reconstructed ideal upper layer signal. Finally, the reconstructed ideal upper layer signal is subtracted from the received layered modulation signal to produce the lower layer signal for processing.
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Citations
28 Claims
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1. A method of receiving layered modulation signals, comprising:
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receiving a layered modulation signal including an upper layer signal and a lower layer signal; demodulating and decoding the upper layer signal from the received layered modulation signal; estimating an upper layer amplitude factor and an upper layer phase factor from the received layered modulation signal; reconstructing a substantially ideal upper layer signal from the demodulated and decoded upper layer signal including matching an ideal amplitude and an ideal phase by applying the upper layer amplitude factor and the upper layer phase factor to the reconstructed ideal upper layer signal; subtracting the reconstructed ideal upper layer signal from the received layered modulation signal to produce the lower layer signal for processing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for receiving layered modulation signals, comprising:
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a signal processor for demodulating and decoding an upper layer signal from a received layered modulation signal wherein the received signal includes the upper layer signal and a lower layer signal; an estimator for estimating an upper layer amplitude factor and an upper layer phase factor from the received layered modulation signal; a synthesizer for reconstructing a substantially ideal upper layer signal from the demodulated and decoded upper layer signal including matching an ideal amplitude and an ideal phase by applying the upper layer amplitude factor and the upper layer phase factor to the reconstructed ideal upper layer signal; and a subtractor for subtracting the reconstructed ideal upper layer signal from the received layered modulation signal to produce the lower layer signal for processing. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification