| 摘要 |
<p>The invention relates to a method and apparatus for digital communications (fig. 2) that provides high data rate wireless connections with bandwidth efficiency. The creation of multiple channels between the transmitter (701) and the receiver (703) is achieved by sampling the wavefield space with respect to the spatial domain. At the transmitter (701), symbols are simultaneously modulated and transmitted using signals that occupy the same frequency portion of the spectrum, but are distinguishable because different is their position in the wavefield space. The received signals are optimally processed to extract the digital information. Given a perfect estimate of the wavefield space parameters, the Maximum Likelihood principle is the optimum strategy for detection. When the wavefield space parameters are a-priori unknown, the Maximum Likelihood detector can not be implemented.</p> |
