Circuit for improving code division ranging precision in multi-user condition

The invention provides a circuit for improving code division ranging precision in a multi-user condition. The circuit for improving code division ranging precision in a multi-user condition can solve the problem about ranging error drift. The circuit for improving code division ranging precision in a multi-user condition can be realized by the technical scheme: an interference target carrier wave passes through a frequency converter; one channel demodulates the interference target information through a dispreading device and takes the demodulated interference target information as the input for an interference cancellation module, and the other channel tracks and demodulates the interference target PN code through an interference target receiver; the obtained local PN code of the interference target is sent to an interference target regeneration base-band module together with the demodulation information, and compensate the delay caused by demodulation of the interference target information after through a fixed delay module 1, and then completes regeneration of the interference target baseband signal together with the demodulation information; the obtained local PN code of the interference target enters an adjustable delay module together with a delay correction module; the delay correction module can adjust the retardation of the adjustable delay module, and compares the relevant processing results after every time of adjustment and searches the maximum relevant output after traversing each retardation so as to obtain the optimum retardation; and the operation results output a baseband signal after interference elimination through the interference cancellation module.