| 摘要 |
<p>In an array of antennas (102-106), data is spatially encoded by selecting a combination of antennas to transmit a particular sequence of eg. BPSK bits or encoding the transmission using the channel signatures of different antennas, each driven by four feed points (110). Modulator 114 selects an antenna and a feed point to be driven by signal 112, thus selecting the polarisation of the signal (vertical, horizontal or LH/RH circular, fig. 2) and allowing channel signatures to be defined. A receiver (fig. 6) determines which combinations of feed points and antennas can be differentiated most easily (302 & 304, fig. 3) and feeds this information back to the transmitter (306), allowing both spatial modulation and space shift keying.</p> |
