Patent ID: 8995539
Filing Date: 2015-03-31
Classification: H04L,H04W

Abstract:
1. A method of operating a wireless terminal, the method comprising: selecting, at the wireless terminal and for use with a communications peer in a peer to peer communications session, a first set of frequency pairs in a first OFDM symbol to use simultaneously for transmission purposes, each individual frequency pair in said first set of frequency pairs including a pair of tones with one of the tones in the individual frequency pair being at the image frequency of the other tone in the individual frequency pair, said first set of frequency pairs including at least a first tone at a first frequency and a second tone at a second frequency which is an image frequency of said first frequency; transmitting, at the wireless terminal, information in said first OFDM symbol using only said selected first set of frequency pairs; selecting a second set of frequency pairs in a second OFDM symbol to use simultaneously for receiving information from a communications peer in a peer to peer communications session, each individual frequency pair in said second set of frequency pairs including a pair of tones with one of the tones in the individual frequency pair being at the image frequency of the other tone in the individual frequency pair, said second set of frequency pairs including a third tone at a third frequency and a fourth tone at a fourth frequency which is an image frequency of said third frequency; and receiving information in said second OFDM symbol, said information being communicated only on said selected second set of frequency pairs.