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1. (WO2019032142) ITERATIVE MULTI-LEVEL EQUALIZATION AND DECODING
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CLAIMS

What is claimed is:

1. A wireless communication method for transmitting orthogonal time frequency space (OTFS) modulated wireless signals from a transmitter, comprising:

receiving information bits for transmission, wherein the information bits include user data and control data;

segmenting the information bits into a stream of segments;

applying a corresponding forward error correction (FEC) code to each of the stream of segments and combining outputs of the FECs to generate a stream of symbols;

processing the stream of symbols to generate a waveform; and

transmitting the waveform over a communication medium.

2. The method of claim 1, wherein each segment in the stream of segments has an equal bit length.

3. The method of claim 1, wherein the processing the stream of symbols includes:

transforming the stream of symbols to orthogonal time frequency space (OTFS) domain by performing an OTFS transform on the stream of symbols.

4. The method of claim 1, wherein at least some of the FEC codes have different block sizes from each other.

5. The method of claim 1, wherein each stream of segments is applied to one or more of the constellation symbol label.

6. The method of claim 1, wherein the combining the outputs of the FECs includes:

performing, on an output of each FEC, a corresponding interleaving operation; and combining outputs of the interleaving operations to generate the stream of symbols.

7. A wireless communication method, implemented at a receiver- side, for receiving a signal comprising multiple symbols; comprising:

performing channel equalization on the signal to generate a channel equalized signal; logically dividing the channel equalized signal into a first number of segments;

demodulating and symbol de-mapping the channel equalized signal in successive steps such that each step operates to recover one or more bits of one of the number of the segments to generate a demodulated bitstream;

wherein an order in which the successive steps are performed depends on a reliability of success of recovering the one or more bits in each of the successive steps;

processing the demodulated bitstream to generate information related to the bits from the signal;

providing a feedback signal to the channel equalization operation based on the processing of the demodulated bitstream; and

logically separating user data and control data from the demodulated bitstream.

8. The method of claim 7, wherein the processing the demodulated bitstream comprises forward error correction decoding using a plurality of forward error correction codes, at least some of which have different block sizes.

9. The method of claim 7, wherein the providing the feedback path comprises performing symbol mapping and orthogonal time frequency space transformation to generate a feedback signal.

10. The method of claim 7, wherein the order of which the successive steps are performed is from the most reliable bit to the least reliable bit.

11. The method of claim 7, wherein the processing the demodulated bitstream comprises deinterleaving each segment of the first number of segments, and forward error correction decoding using a plurality of forward error correction codes, at least some of which have different block sizes, outputs of the deinterleaving of the first number of segments.

12. The method of claim 7, wherein the providing the feedback signal comprises interleaving, the recovered one or more bit-related information from each of the first number of segments using a corresponding interleaver depth.

13. The method of claim 7, wherein the equalized signal is processed to an inverse orthogonal time frequency space transform prior to performing symbol demapping.

14. A wireless communication device comprising a processor configured to implement a method for transmitting orthogonal time frequency space (OTFS) modulated wireless signals from a transmitter, comprising:

receiving information bits for transmission, wherein the information bits include user data and control data;

segmenting the information bits into a stream of segments;

applying a corresponding forward error correction (FEC) code to each of the stream of segments and combining outputs of the FECs to generate a stream of symbols;

processing the stream of symbols to generate a waveform; and

transmitting the waveform over a communication medium.

15. A computer-readable memory storing instruction comprising processor- implementable code, wherein the code include instructions which, when executed by the processor, cause the processor to implement method for transmitting orthogonal time frequency space (OTFS) modulated wireless signals from a transmitter, comprising:

receiving information bits for transmission, wherein the information bits include user data and control data;

segmenting the information bits into a stream of segments;

applying a corresponding forward error correction (FEC) code to each of the stream of segments and combining outputs of the FECs to generate a stream of symbols;

processing the stream of symbols to generate a waveform; and

transmitting the waveform over a communication medium.

16. A wireless communication device comprising a processor configured to implement a method for receiving a signal comprising multiple symbols; comprising:

performing channel equalization on the signal to generate a channel equalized signal; logically dividing the channel equalized signal into a first number of segments;

demodulating and symbol de-mapping the channel equalization signal in successive steps such that each step operates to recover one or more bits of one of the number of the segments to generate a demodulated bitstream;

wherein an order in which the successive steps are performed depends on a reliability of success of recovering the one or more bits in each of the successive steps;

processing the demodulated bitstream to generate information related to the bits from the signal;

providing a feedback signal to the channel equalization operation based on the processing of the demodulated bitstream; and

logically separating user data and control data from the demodulated bitstream.

17. The wireless communication device of claim 16, wherein the processing the demodulated bitstream comprises forward error correction decoding using a plurality of forward error correction codes, at least some of which have different block sizes.

18. A computer-readable memory storing instruction comprising processor-implementable code, wherein the code include instructions which, when executed by the processor, causes the processor to implement method for receiving a signal comprising multiple symbols; comprising: performing channel equalization on the signal to generate a channel equalized signal; logically dividing the channel equalized signal into a first number of segments;

demodulating and symbol de-mapping the channel equalization signal in successive steps such that each step operates to recover one or more bits of one of the number of the segments to generate a demodulated bitstream;

wherein an order in which the successive steps are performed depends on a reliability of success of recovering the one or more bits in each of the successive steps;

processing the demodulated bitstream to generate information related to the bits from the signal;

providing a feedback signal to the channel equalization operation based on the processing of the demodulated bitstream; and

logically separating user data and control data from the demodulated bitstream.

19. The computer program product of claim 18, wherein the processing the demodulated bitstream comprises forward error correction decoding using a plurality of forward error correction codes, at least some of which have different block sizes.