WIRELESS COMMUNICATION METHODS AND EQUIPMENT

Abstract

In general, the invention relates to a method and apparatus for wireless communication. A wireless transmission technique for null data packets with a long training field sequence is described. A long training field sequence (LTF) is generated for null data packets (NDPs) to be transmitted over a channel with a bandwidth that is an integer multiple of 80 MHz. The LTF sequence is modulated across multiple channels of the channel, excluding the tones in the null subchannels within the channel. Modulation may be based on the size and position of the null subchannel and the symbol interval associated with the transmission of the LTF sequence. The NDP is transmitted including the LTF sequence to a second wireless communication apparatus over the channel. Partial bandwidth feedback may be received in response to the LTF in the null NDP.