Low bandwidth PHY transmission in a wider bandwidth

摘要

A method for generating signals to be transmitted within a BSS channel, where a set of component channels is collectively coextensive with the BSS channel, includes determining that a first duplicate, in frequency, of a low bandwidth mode data unit will be located at an edge of the BSS channel. Each duplicate includes OFDM tones and has a bandwidth less than the narrowest channel of the component channels. The OFDM tones in each duplicate include one or more data tones, one or more pilot tones, and one or more guard tones. The method also includes generating a transmission signal comprising the duplicates, at least in part by scaling down at least one data tone, and/or zeroing out at least one data tone, of the first duplicate in response to determining that the first duplicate will be located at an edge of the BSS channel.

主权项

1. A method comprising:
determining, at a communication device, that a physical layer (PHY) data unit is to be transmitted in a duplicate mode in which a plurality of duplicate instances of the PHY data unit are to transmitted in respective 1 MHz bandwidth portions of a communication channel having a bandwidth of 2 MHz, 4 MHz, 8 MHz, or 16 MHz; determining, at the communication device, that a first instance of the PHY data unit will be located at an edge of the communication channel, wherein
each instance (i) includes a plurality of orthogonal frequency division multiplexing (OFDM) tones and (ii) has a bandwidth of 1 MHz, andthe plurality of OFDM tones in each instance includes one or more data tones, one or more pilot tones, and one or more guard tones; and generating, at the communication device, a first transmission signal comprising the one or more instances, wherein generating the first transmission signal includes,
in response to determining that the first instance will be located at the edge of the communication channel, one or both of (i) scaling down at least one data tone of the first instance and (ii) zeroing out at least one data tone of the first instance.