Spectrum Signal Processing (SSPI) Message Board

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Technology Stocks : Spectrum Signal Processing (SSPI)

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To: pat mudge who wrote (584)	2/6/1998 5:12:00 PM
From: ECAC Hockey	Read Replies (1) of 4400

<< For Palmtops and other mobile devices to have wireless access, they're installing base stations on power poles through cities, and also installing them in airports and hotels. >> I copied the following from a Lucent press release. This is definitely a target market for Spectrum's c6x based products. Q. How are DSPs used in wireless base stations? A. Base stations capture voice signals from the radio waves and relay them to a telephone line. This can be a daunting task. Callers may be moving, and signal strengths can ebb and flow. Some signals may reflect off buildings and other structures, so that the base station receives both the original signal and a slightly delayed "shadow" signal. Other radio devices or even adverse weather in the cell may create intermittent noise. The challenge is to receive the user's signal, recover the voice data from the received digital stream, and pass the signal along to the system's public telephone switching office. Such signal-processing tasks, known as equalization, noise filtering, channel decoding, encryption and forward error correction, are optimally performed by DSPs.

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