FAST JOINT DETECTION

摘要

K data signals are transmitted over a shared spectrum in a code division access communication system. A combined signal is received and sampled over the shared spectrum (48). The combined signal has the K transmitted data signals (48). A combined channel response matrix is produced (49) using the codes and impulse responses of the K transmitted data signals. A block column of a combined channel correlation matrix is determined using the combined channel response matrix (50). Each block entry of the block column is a K by K matrix (51). At each frequency point k, a K by K matrix is determined by taking the Fourier transform of the block entries of the block column (52). An inverse of a K by K matrix is multiplied to a result of the Fourier transform (52). Alternately, forward substitution (53) and backward substitution (54) can be used to solve the system. An inverse Fourier transform is used to recover the data from the K data signals (55).