COOPERATIVE BROADCAST MULTI-HOP NETWORK THAT EMPLOYS BROADCAST FLOOD ROUTING AND MULTI-HOP TRANSMISSION USING A DIRECT-SEQUENCE SPREAD-SPECTRUM (DSSS) WAVEFORM WITH COOPERATIVE BEAMFORMING AND ADAPTIVE SPACE-SPECTRUM WHITENING, AND A NODE FOR USE IN A COOPERATIVE BROADCAST MULTI-HOP NETWORK HAVING A MULTI-USER RAKE RECEIVER AND/OR AN ADAPTIVE SPACE-SPECTRUM WHITENER

摘要

A cooperative broadcast multi-hop network is provided that employs broadcast flood routing and multi-hop transmission using a direct-sequence spread-spectrum (DSSS) waveform with cooperative beamforming and adaptive space-spectrum whitening. Node(s) can receive DSSS signals from other nodes on a particular channel, and output a channel that includes the plurality of DSSS signals, which include transmissions that are directly received from other nodes. A multi-user RAKE (mRAKE) receiver can cooperatively beamform and perform adaptive space-spectrum whitening to detect and remove interference signals received from each of the channels by performing a covariance analysis to generate channelized signals. Modified Discrete Fourier Transform analysis and synthesis modules can generate an interference mitigated time-domain channelized signals, such that the mRAKE receiver, when performing demodulation processing, can combine the interference mitigated time-domain channelized signals received from the other nodes.