According to the model mismatch error caused by non-multipath time delay in GO-MC-CD-MA system, an improved LS channel estimation technology is introduced. The problem of model mismatch error from ignoring noise is solved effectively. And the error can be compensated by adaptive regulation effectively. So the anti-noise ability is enhanced. The improved LS channel algorithm is realized in field programmable gate array (FPGA) and the structure block diagrams are presented.