Localized equalization for channels with intercarrier interference
AssigneeCohere Technologies, Inc.
InventorsMichail Tsatsanis, Christian Ibars Casas
Life of this patent
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Abstract
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.
Claims20
A wireless communication method for receiving an orthogonal time frequency space (OTFS) modulated signal, comprising:
- receiving the OTFS modulated signal over a wireless communication channel;
- dividing the OTFS modulated signal along a delay-dimension into a plurality of segments;
- performing, for each segment, channel estimation to produce a plurality of channel estimates corresponding to the plurality of segments;
- 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 device comprising a memory storing instructions and a processor, wherein the instructions, when executed by the processor, cause the processor to at least:
- receive an orthogonal time frequency space (OTFS) modulated signal over a wireless communication channel;
- divide the OTFS modulated signal along a delay-dimension into a plurality of segments;
- perform, for each segment, channel estimation to produce a plurality of channel estimates corresponding to the plurality of segments;
- perform, for each segment, channel equalization using a corresponding channel estimate from the plurality of channel estimates to generate a channel-equalized symbol stream;
- and
- generate information bits from the channel-equalized symbol stream.
A wireless communication system, comprising:
- a transmitter configured to:
- pre-process, based on a set of basis functions, information bits to generate a plurality of pre-processed symbols,
- modulate, using an orthogonal time frequency space (OTFS) transformation, the plurality of pre-processed symbols to generate an OTFS modulated signal, and
- transmit the OTFS modulated signal over a wireless communication channel;
- and
- a receiver configured to:
- receive the OTFS modulated signal over the wireless communication channel, divide the OTFS modulated signal along a delay-dimension into a plurality of segments,
- perform, for each segment, channel estimation to produce a plurality of channel estimates corresponding to the plurality of segments,
- perform, for each segment, channel equalization using a corresponding channel estimate from the plurality of channel estimates to generate a channel-equalized symbol stream, and
- generate the information bits from the channel-equalized symbol stream.
Dependencies are inferred from the claim text.