3G cell-site modem makes its debut

Qualcomm is now sampling its CDMA Technologies (QCT) CSM5500 Cell-Site Modem (CSM) IC and associated system software.

Qualcomm is sampling its CDMA Technologies (QCT) CSM5500 Cell-Site Modem (CSM) IC and associated system software.

The complete solution supports the new third-generation (3G) CDMA2000 1x Evolution Data Only (1xEV-DO) standard using a 1.25 MHz channel to provide peak data throughput of 2.4 Mbps on the forward link.

The 1xEV-DO standard evolved from Qualcomm ‘s development of High Data Rate (HDR) technology and, the company claims, provides the lowest cost-per-bit of any announced technology for wireless high-speed data transmission, including General Packet Radio Service (GPRS) and Wideband CDMA (WCDMA).

The CSM5500 device is an end-to-end tested 1xEV-DO solution that is verified against Qualcomm ‘s MSM5500 Mobile Station Modem (MSM) 1xEV-DO integrated circuit, and is a pin-and package-compatible replacement for existing 1xEV trial systems, offering cost and power savings.

Each CSM5500 device can operate in one of three modes – modulator, demodulator or decoder. The CSM5500 modulator can support up to three sectors on the forward link. Each CSM5500 demodulator can support 24 channel elements on the reverse link. A single CSM5500 turbo decoder can support the decoding needs across all three sectors.

Production quantities of the CSM5500 integrated circuit and system software are expected to be available during the third quarter of calendar 2001.

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