Cross-layer allocation of spectral resource to spatially multiplexed communication

摘要

A system detects a communication transmitted from multiple transmitting antennas. The system includes a media access controller and a physical block. Based on a signal to noise ratio (SNR), the allocation circuit of the media access controller assigns a portion of a spectral resource to the communication. The physical block includes multiple receiving antennas for receiving the communication, an estimating circuit for determining the SNR of the communication received at the receiving antennas, and a sphere detector. The sphere detector calculates a respective cost for possible combinations of symbols for the transmitting antennas. The sphere detector calculates the respective costs of the possible combinations from the portion of the spectral resource of the communication received at the receiving antennas. The sphere detector selects one of the possible combinations in response to the respective costs. The system detects the transmitted communication to be the symbols of the selected combination.