초록 ▼

A Code-Division Multiple Access (CDMA) receiver removes the pilot signal from the received signal. The pilot signal is defined by its multipath parameters (amplitudes, phase shift and delays) and its signature sequence. Since this information is known at the user's receiver terminal (i.e., handset),

A Code-Division Multiple Access (CDMA) receiver removes the pilot signal from the received signal. The pilot signal is defined by its multipath parameters (amplitudes, phase shift and delays) and its signature sequence. Since this information is known at the user's receiver terminal (i.e., handset), the pilot signals of the interfering multipath components of the baseband received signal are detected and removed prior to demodulation of the desired multipath component. The pilot signal may be cancelled prior to or following the data accumulation stage. The pilot signal cancellation can be switched on and off depending on the detected path signal level.

대표청구항 ▼

[ We claim:] [1.] A code division multiple access (CDMA) receiver for receiving and demodulating a coherent CDMA signal including at least one user data channel and a separate pilot channel over a plurality of L(L>or =2) paths, where the desired data channel is orthogonal to the pilot channel for a

[ We claim:] [1.] A code division multiple access (CDMA) receiver for receiving and demodulating a coherent CDMA signal including at least one user data channel and a separate pilot channel over a plurality of L(L>or =2) paths, where the desired data channel is orthogonal to the pilot channel for a given path, the CDMA receiver comprisingL path demodulators, each demodulator for estimating a data channel and a pilot channel from a CDMA signal received over one of the L paths and for generating L-1 pilot cancellation signals each to be used by an associated subtractor means, andL subtractor means, each subtractor means for subtracting the L-1 pilot cancellation signals produced by non-associated L-1 path demodulators from the CDMA signal associated with that subtractor means.