초록 ▼

Signal delay and combining techniques are used with multipath signals to provide signal diversity gain within CDMA over-the-air repeater and low noise amplifier systems. An incoming signal from a remote user is typically processed through two processing paths, wherein one path adds a delay to the pr

Signal delay and combining techniques are used with multipath signals to provide signal diversity gain within CDMA over-the-air repeater and low noise amplifier systems. An incoming signal from a remote user is typically processed through two processing paths, wherein one path adds a delay to the processed signal. The two signal paths are then combined and filtered through a sharp band pass filter, preferably a SAW filter. In an over the air repeater, the filtered signal is retransmitted towards a CDMA rake receiver at a base station, which can process the multipath signal to produce a clean signal representation. In a low noise amplifier, the filtered signal is transferred directly into a base station or repeater. The use of SAW filters protect the latter stages of the low noise amplifier, and also protect the base station from out-of-band signal interference. A quadruple diversity low noise amplification system for base stations embodiment is also disclosed, which provides quadruple diversity and improved sensitivity for CDMA base stations.

대표청구항 ▼

[ What is claimed is:] [1.] A code division multiple access signal repeater, comprising:at least two subscriber antenna connectors adapted to connect to a subscriber antenna assembly having at least two subscriber antennas, each of said subscriber antenna connectors connected to one of said subscrib

[ What is claimed is:] [1.] A code division multiple access signal repeater, comprising:at least two subscriber antenna connectors adapted to connect to a subscriber antenna assembly having at least two subscriber antennas, each of said subscriber antenna connectors connected to one of said subscriber antennas, each of said subscriber antennas adapted to receive independent fading decorrelated said code division multiple access signals from at least one mobile user;a first signal processing path and a second signal processing path for processing said received code division multiple access signals, each of said paths connected to one of said at least two subscriber antenna connectors, said first signal processing path having a delay element, said first signal processing path having a first gain, said second signal processing path having a second gain;means for balancing differential gain between said first gain of said first signal processing path and said second gain of said second signal processing path;a combiner connected to said first signal processing path and said second signal processing path, said combiner adapted to combine said processed code division multiple access signals; anda donor antenna connector connected to said combiner and adapted to connect to a donor antenna assembly, said donor antenna assembly adapted to transmit said processed, combined code division multiple access signal.