Method and device for quantizing the input to soft decoders
First Claim
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1. A method comprising:
- detecting fading characteristics of a dynamically fading channel from a received signal; and
determining a set of correction parameters of a quantization correction command based on the fading characteristics for a segment of said received signal to be used to produce a quantized signal.
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Abstract
A receiver including a signal reception unit, for receiving a signal from a dynamically fading channel, a demodulator, connected to the signal reception unit, for demodulating the received signal, thereby producing a demodulated signal therefrom, a quantizing processor, connected to the demodulator and to the signal reception unit, for analyzing the received signal and for quantizing the demodulated signal, thereby producing a quantized signal, and a decoder, connected to the quantizing processor, for decoding the quantized signal, wherein the quantizing processor normalizes the demodulated signal according to the estimated fading of the received signal.
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Citations
24 Claims
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1. A method comprising:
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detecting fading characteristics of a dynamically fading channel from a received signal; and
determining a set of correction parameters of a quantization correction command based on the fading characteristics for a segment of said received signal to be used to produce a quantized signal. - View Dependent Claims (2, 3, 4)
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5. A method comprising:
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detecting fading characteristics of a signal received over a dynamically fading channel by estimating a root-mean-square (RMS) of said received signal and computing the minimum and maximum quantities of samples of said received signal;
determining a set of correction parameters of a correction command according to the detected fading characteristic; and
quantizing at least one segment of said received signal according to said quantization correction command to produce a quantized signal. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. In a receiver which includes a signal reception unit, a demodulator and a decoder, the receiver receiving a signal from a dynamically fading channel, the demodulator demodulating said received signal to produce a demodulated signal, a quantizing device comprising:
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a channel fading detection unit, coupled to said signal reception unit, to detect fading characteristics of said dynamically fading channel;
a processor, coupled to said channel fling detection unit, to process said fading characteristics so as to produce a quantization correction command that includes a set of correction parameters for at least one segment of said received signal; and
a quantizing unit, coupled to said processor, to said demodulator and to said decoder, to quantize said demodulated signal so as to produce a quantized signal and to correct said at least one segment according to said correction command, wherein said decoder is to decode said quantized signal.
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14. In a receiver which includes a signal reception unit, a demodulator, a quantizing unit and a decoder, the receiver receiving a signal from a dynamically fading channel, the demodulator demodulating said received signal to produce demodulated signal, a fading compensation device comprising;
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a channel fading detection unit, coupled to said signal reception unit, to detect fading characteristics of said dynamically fading channel;
a processor, coupled to said channel fading detection unit, to process said fading characteristics, so as to produce a correction command that includes a set of correction parameters to quantize at least one segment of said received signal; and
a correction unit, coupled to said processor, to said demodulator and to said quantizing unit, to correct a demodulated segment corresponding to said at least one segment according to said correction command so as to produce a corrected segment, wherein said correction unit is to replace said demodulated segment with said corrected segment at the input of said quantizing unit. - View Dependent Claims (15)
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16. A receiver comprising:
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a signal reception unit to receive a signal from a dynamically fading channel;
a demodulator, coupled to said signal reception unit, to demodulate said received signal to produce a demodulated signal therefrom;
a quantizing processor, coupled to said demodulator and to said signal reception unit, to analyze said received signal and to quantize said demodulated signal to produce a quantized signal; and
a decoder, coupled to said quantizing processor, to decode said quantized signal, wherein said quantizing processor is to normalize said demodulated signal according to the estimated fading of said received signal. - View Dependent Claims (17, 18, 19)
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20. A method of producing a quantized signal comprising:
quantizing at least one segment of a signal received over a dynamically fading channel by using a set of correction parameters of a quantization correction command that is determined, at least in part, from fading characteristics of said channel.
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21. A receiver comprising:
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a channel estimator to detect fading characteristics of a dynamically fading channel; and
a quantizer to quantize at least one segment of a signal received over said dynamically fading channel by using a set of correction parameters of a quantization correction command that is determined at least in part from said fading characteristics. - View Dependent Claims (22)
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23. A receiver comprising:
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a quantizer to quantize at least one segment of a received signal by using a set of correction parameters of a quantization correction command; and
a processor to determine said quantization correction command from code properties of a frame of said received signal containing said at least one segment, wherein at least one frame of said received signal has different code properties than another frame of said received signal. - View Dependent Claims (24)
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Specification