Iterative multi-level equalization and decoding

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 first channel equalized signal;
• transforming, using an inverse orthogonal time frequency space (OTFS) transformation comprising an inverse symplectic transform, the first channel equalized signal into a second channel equalized signal;
• logically dividing second 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 first number of 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;
• and
• providing a feedback signal to the channel equalization operation based on the processing of the demodulated bitstream.

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 the method comprising:

• receiving information bits for transmission;
• 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 FEC codes to generate a first stream of symbols;
• transforming, using an orthogonal time frequency space (OTFS) transformation comprising a symplectic transform, the first stream of symbols into a second stream of symbols;
• processing the second stream of symbols to generate a waveform;
• and
• transmitting the waveform over a communication medium.

A non-transitory computer-readable memory storing instructions 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:

• instructions for receiving information bits for transmission;
• instructions for segmenting the information bits into a stream of segments;
• instructions for applying a corresponding forward error correction (FEC) code to each of the stream of segments and combining outputs of the FEC codes to generate a stream of symbols;
• instructions for transforming, using an orthogonal time frequency space (OTFS) transformation comprising a symplectic transform, the first stream of symbols into a second stream of symbols;
• instructions for processing the second stream of symbols to generate a waveform;
• and
• instructions for transmitting the waveform over a communication medium.

A wireless communication device comprising a processor configured to implement a method for receiving a signal comprising multiple symbols, the method comprising:

• performing channel equalization on the signal to generate a first channel equalized signal;
• transforming, using an inverse orthogonal time frequency space (OTFS) transformation comprising an inverse symplectic transform, the first channel equalized signal into a second channel equalized signal;
• logically dividing the second 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 first number of 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;
• and
• providing a feedback signal to the channel equalization operation based on the processing of the demodulated bitstream.

A non-transitory computer-readable memory storing instructions comprising processor-implementable code, wherein the code includes instructions which, when executed by the processor, causes the processor to implement method for receiving a signal comprising multiple symbols, comprising:

• instructions for performing channel equalization on the signal to generate a first channel equalized signal;
• instructions for transforming, using an inverse orthogonal time frequency space (OTFS) transformation comprising an inverse symplectic transform, the first channel equalized signal into a second channel equalized signal;
• instructions for logically dividing the second channel equalized signal into a first number of segments;
• instructions for 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 first number of 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;
• instructions for processing the demodulated bitstream to generate information related to the bits from the signal;
• and
• instructions for providing a feedback signal to the channel equalization operation based on the processing of the demodulated bitstream.