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DSP suits femtocell base stations

Posted: 04 Dec 2008     Print Version  Bookmark and Share

Keywords:digital signal processor  femtocell base stations  design wins 

Texas Instruments has introduced the TCI6484, its first digital signal processor (DSP) designed for femtocell base stations. The new DSP supports all major 2G/3G and 4G solutions including GSM, CDMA, WCDMA, TD-SCDMA, WiMAX and LTE. TI says that the TCI6484 is also suitable for macro, micro, and pico base stations.

The TCI6484 is based on C64x+ DSP, which is augmented by RSA and Viterbi coprocessors. The TCI6484 also features dual Turbo co-processors that provide up to 34 megabits per second (Mbps) of symbol-rate performance. The chip's memory system features 3 MB of on-chip memory and a 667 MHz DD2 memory interface. The TCI 6484 also incorporates a sGMII interface for Ethernet and a 64-bit EMIF for analogue/RF connectivity.

Although the TCI6484 is TI's first femtocell-specific DSP, the company has been quietly racking up femtocell design wins. In fact, TI claims that its DSPs are in the majority of femtocells deployed today, and backs up this claim with an impressive list of wins at companies including Samsung, Airvana, Huawei, Lyrtech, ZTE and Airhop.

Although TI has kept its femtocell design wins quiet until now, its success is hardly a surprise. Femtocells use much of the same technology as base stations, and TI dominates the market for base station DSPs. It makes sense that femtocell vendors would want to leverage their existing base station software rather than start over with all-new designs.

The TCI6484 product is shipping to customers today.

-Kenton Williston
DSP DesignLine

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