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TI introduces multi-core DSPs for wireless apps

Posted: 14 Feb 2007     Print Version  Bookmark and Share

Keywords:DSP  W-CDMA  processor  TI  UMTS 

Texas Instruments Inc. (TI) will introduce two multi-core DSPs for wireless infrastructure at the upcoming 3GSM World Congress in Barcelona, Spain. The TCI- 6488, a W-CDMA base band device, will use three 1GHz C64xx cores. The TNETV3020 gateway processor, meanwhile, has six separate C64xx DSP cores rated at 500MHz each.

Triple-core design
The 6488 was no surprise, since a triple-core design makes even more sense for W-CDMA than for GSM. In UMTS designs, the chip could be used for a standard UMTS receive-transmit base station with 48 users; for a receive-only UMTS Macro BTS using high-speed downlink packet access; or for a dedicated base station for high-speed uplink packet access. The intent in such designs, said communications infrastructure marketing manager John Smrstik, is to reduce a multi-line-card base station with FPGAs, ASICs and host processors to a single board in which multiple TCI6488 DSPs are linked via a RapidIO switch.

Dedicated blocks on the DSP handle Viterbi code and turbo code coprocessing, and search and rake-receiver functions can be handled directly in the base band processing. Standardised antenna interfaces support up to 48 antenna streams per base station. A GbE port also is on the chip.

Six-core gateway
For emerging Internet Protocol multi-media subsystems, TI is offering a six-core gateway chip. Each of the six cores on the TNETV3020 has its own dedicated blocks for Level 1 data and Level 1 instruction cache, as well as Level 2 cache, along with a common block of Level 2 shared memory. The enhanced DMA controller on-chip has an embedded switch fabric. "We had to keep support for ATM in the 3020," Smrstik said.

The processor is the first to support H.263, MPEG-4 and CIF functions for video, and expands voice codec channels significantly from the 3010. G.711 with internal memory, for example, expands from 192 to 504 channels, while G.729 expands from 96 to 252. Surf Communications Inc. provides support for combined voice and video on one DSP.

Smrstik said that Telogy Networks, a software company TI acquired in 1999, remained critical to TI's wide support for codecs and middleware in its TNETV series of gateways.

- Loring Wirbel
EE Times




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