Wireless local area networks using orthogonal time frequency space modulation

Abstract

Techniques for wireless networking that include transmission and reception of signals using orthogonal time frequency space (OTFS) modulation techniques are disclosed. For example, a wireless access point may communicate with a station using OFDM modulated WiFi (OFDM-WiFi) at one time and using OTFS modulated WiFi (OTFS-WiFi) at another time. The OTFS-WiFi may provide improved throughput and coverage over OFDM-WiFi in static and mobile environments.

1 . (canceled) 
     
     
         2 . A wireless communication apparatus, comprising a processor configured to:
 modulate received data by an orthogonal time frequency space (OTFS) modulator to generate OTFS symbols, wherein each OTFS symbol comprises an Nv*Nh frame comprising modulated data bits, where Nv and Nh are positive integers;   process the OTFS symbols by a two-dimensional (2-D) fast Fourier transformer (FFT),   apply a one-dimensional (1D) inverse fast Fourier transformer (FFT) to an output of the 2-D FFT, and   generate a transmission waveform by insert a cyclic prefix and a cyclic suffix to an output of the 1D inverse FFT.   
     
     
         3 . The apparatus of  claim 2 , wherein the output of the 2-D FFT is multiplied by a Zadoff-Chu sequence prior to the applying the 1D inverse FFT. 
     
     
         4 . The apparatus of  claim 2 , wherein the output of the 2-D FFT is multiplied by a pseudo noise (PN) sequence prior to the applying the 1D inverse FFT. 
     
     
         5 . The apparatus of  claim 2 , wherein the modulated received bits are modulated using Quadrature Amplitude Modulation (QAM). 
     
     
         6 . The apparatus of  claim 2 , wherein the processor is configured generate the Nv*Nh frame on a row-by-row basis. 
     
     
         7 . The apparatus of  claim 2 , wherein the processor is configured generate the Nv*Nh frame on a column-by-column basis. 
     
     
         8 . The apparatus of  claim 2 , wherein the generated transmission waveform includes pilot tones. 
     
     
         9 . The apparatus of  claim 2 , wherein the transmission waveform comprises a preamble that is formatted according to an IEEE 802.11 or an IEEE 802.11ac standard. 
     
     
         10 . A method for wireless communication, comprising:
 modulating received data by an orthogonal time frequency space (OTFS) modulator to generate OTFS symbols, wherein each OTFS symbol comprises an Nv*Nh frame comprising modulated data bits, where Nv and Nh are positive integers;   processing the OTFS symbols by a two-dimensional (2-D) fast Fourier transformer (FFT),   applying a one-dimensional (1D) inverse fast Fourier transformer (FFT) to an output of the 2-D FFT, and   generating a transmission waveform by insert a cyclic prefix and a cyclic suffix to an output of the 1D inverse FFT.   
     
     
         11 . The method of  claim 10 , wherein the output of the 2-D FFT is multiplied by a Zadoff-Chu sequence prior to the applying the 1D inverse FFT. 
     
     
         12 . The method of  claim 10 , wherein the output of the 2-D FFT is multiplied by a pseudo noise (PN) sequence prior to the applying the 1D inverse FFT. 
     
     
         13 . The method of  claim 10 , wherein the modulated received bits are modulated using Quadrature Amplitude Modulation (QAM). 
     
     
         14 . The method of  claim 10 , wherein the Nv*Nh frame is generated a row-by-row basis. 
     
     
         15 . The method of  claim 10 , wherein the Nv*Nh frame is generated on a column-by-column basis. 
     
     
         16 . The method of  claim 10 , wherein the generated transmission waveform includes pilot tones. 
     
     
         17 . The method of  claim 10 , wherein the transmission waveform comprises a preamble that is formatted according to an IEEE 802.11 or an IEEE 802.11ac standard.