A wireless communication method for receiving an orthogonal time frequency space (OTFS) modulated signal includes receiving the OTFS signal over a wireless communication channel, dividing the receiving OTFS signal along a delay-dimension into a plurality of segments, performing, for each segment, channel estimation independent of channel estimation for other segments to generate a plurality of channel estimates, performing, for each segment, channel equalization using a corresponding channel estimate from the plurality of channel estimates to generate a channel-equalized symbol stream, and generating information bits from the channel-equalized symbol stream.

A wireless communication method for receiving an orthogonal time frequency space (OTFS) modulated signal includes receiving the OTFS signal over a wireless communication channel, dividing the receiving OTFS signal along a delay-dimension into a plurality of segments, performing, for each segment, channel estimation independent of channel estimation for other segments to generate a plurality of channel estimates, performing, for each segment, channel equalization using a corresponding channel estimate from the plurality of channel estimates to generate a channel-equalized symbol stream, and generating information bits from the channel-equalized symbol stream.

This invention discloses apparatus and methods for detecting transmit symbols from the receiving waveform samples at the receiver side for communications systems. The receiving waveform samples are corrupted by channel and noise effects and the detection is carried out with a maximum likelihood optimality criterion. This invention utilizes a successive linear constraint exchange scheme that formulates a sequence of linearly constrained minimization subproblems to allow the solutions to these subproblems, combined with certain quantization and mapping operations, to converge to the optimal maximum likelihood estimate. This invention is applicable to any digitally modulated communications systems, including but not limited to Multiple Input Multiple Output (MIMO) communications systems.

A method carried out by an electronic device in a wireless communication system may comprise: acquiring received signals including a received data signal and a received reference signal; acquiring noise and interference estimation information based on channel estimation using the received reference signal; acquiring a weight based on information related to the resolution of a receiver of the electronic device, channel estimation information, and the noise and interference estimation information; acquiring a signal-to-interference-plus-noise ratio (SINR) of the received reference signal based on the weight and the information related to the resolution; and carrying out decoding of the received signals based on the SINR and the received data signal.