Radio frequency communication with antenna index coding

摘要

The inventors have recognized that in RF communication systems, by switching between transmit antennas of an RF transmitter on a sub-symbol basis (antenna index coding), and/or by adaptively determining how often antenna switching occurs (adaptive antenna hopping), an increased amount of data may be wirelessly transmitted to an RF receiver without significantly increasing energy consumption. The inventors have determined that in certain systems, such as ZigBee, data symbols consist of elementary waveform patterns, and that such waveform patterns for transmit antennas may be stored by an RF receiver for later determining transmit antennas for data symbols. The inventors have also determined that the invention may be applied in the frequency domain, such as to OFDM, by storing subcarrier waveform patterns for particular transmit antennas and later determining transmit antennas for subcarriers of data symbols.

主权项

1. A Radio Frequency (RF) communication system comprising:
first and second antennas; an RF transmitter in communication with the first and second antennas, the RF transmitter being operable to send a data symbol using at least one of the first and second antennas, the data symbol comprising a plurality of waveform patterns, the data symbol forming a first data stream; and a control system in communication with the RF transmitter, the control system being operable to send a second data stream by selectively switching the RF transmitter to send a first portion of the data symbol using the first antenna and a second portion of the data symbol using the second antenna, wherein the first portion is a first series of waveform patterns and the second portion is a second series of a waveform patterns.