Method and device for managing multipath signals

Abstract

A method for managing multipath signals to be demodulated by a receiver withmultiple demodulators. The method includes a series of steps, including receiving themultipath signals at a wireless communication receiver device, finding the multipath signalshaving sufficient signal strength for demodulation, and measuring an arrival time of one ofthe multipath signals. In one embodiment, the present invention also recites measuring asignal-to-noise ratio (SNR) level of one of the multipath signals, updating a multipath listwith the arrival time and the signal-to-noise ratio if the multipath signal is identified basedupon the arrival time with one of the multipath signals existing in the multipath list, andidentifying newly-found multipath signals and evaluating one of the newly-found multipathsignals based on the signal-to-noise ratio for categorization into one of a plurality of states.Additionally, in one embodiment of the present invention, the present method includesevaluating one of the existing multipath signals based on the signal-to-noise ratio for movingthe multipath signal from one to another of a plurality of states, selectively providing one ofthe multipath signals for a demodulation operation based upon its state, selectively rejectingone of the multipath signals from the multipath list based on the signal-to-noise ratio, andrepeating several of the above mentioned operations to process all found multipath signals.

Description

technical field [0001] The present invention relates to the field of digital communications, more precisely to a device and a method for managing multipath signals to be demodulated by a receiver with a demultiplexer. This specification discusses methods and apparatus for managing multipath signals for a receiver with a demultiplexer. Background technique [0002] Today, wireless telephony (such as the use of mobile phones) has become a widely used means of communication. Variable rate communication systems, such as Code Division Multiple Access (CDMA) spread spectrum systems, have become the most commonly used wireless communication technologies. Due to increasing communication demands and limited resources, there is a need to improve the capacity, fidelity and performance of communication systems. [0003] Referring to prior art Figure 1A, there is shown multipath signal propagation between a conventional base station and a mobile telephone. Conventional base station 10...

AI Technical Summary

Problems solved by technology

The downside of system thrashing is that it takes a lot of system resources, such as processor operations

During system thrashing, the processor may be overloaded by the constant assignment and reassignment of multiple demodulators to different multipath signals

Additionally, thrashing may be a degradation in the quality of the output signal from the mobile phone 102, as such switching operations may cause data loss or audio interference, or may introduce latency effects

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