Choosing the appropriate DSP for your 3G wireless handset design

Slade, Brendon
December 2005
Portable Design;Dec2005, Vol. 11 Issue 12, p14
This article focuses on the selection of appropriate digital signal processors (DSP) for one's 3G wireless handset design. The author of this article opines that the protocols for 3G are an order of magnitude greater in complexity than those for 2G. It results in tremendous software burden on the companies in this market. It is also the reason behind pressure on the platform architects to make the right choices in partitioning between programmable and fixed-function DSPs. In the changed circumstances the designers need to select DSPs carefully, considering not only baseband processing requirements but also productivity, future proofing, power and cost. Considering the same cause this article examines the 3G baseband challenges, programmable DSP requirements and process-balancing issues that designers must address when trying to find the right DSP for their 30 wireless handset design. The author in this article analyzes the main baseband processing steps for time-division multiplexed synchronous code-division multiple access (TD-SCDMA) and wideband CDMA. TD-SCDMA supports multiple subscribers using a combination of time division and code-division multiplexing.


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