GC5322 Wideband Digital Predistortion Transmit Processor

The GC5322 is a flexible transmit sector processor that includes a digital upconverter (DUC) block, a crest factor reduction (CFR) block, and a digital predistortion (DPD) block and its associated feedback chain. The GC5322 processes composite input bandwidths of up to 40 MHz and processes DPD expansion bandwidths of up to 140 MHz (actual performance may vary for signal bandwidths exceeding 23 MHz). By reducing both the peak-to-average ratio (PAR) of the input signals using the CFR block and linearizing the power Amplifier (PA) using the DPD block, the GC5322 reduces the costs of multicarrier PAs (MCPA) for Wireless infrastructure applications. The GC5322 applies CFR and DPD while a separate Microprocessor (a Texas Instruments TMS320C6727 DSP) is used to optimize performance levels and maintain target PA performance levels. By including the GC5322 in their system architecture, manufacturers of BTS equipment CAN realize significant savings on power Amplifier bill of materials (BOM) and overall operational costs due to the PA efficiency improvement. The GC5322 meets multicarrier 3G performance standards (PCDE, composite EVM, and ACLR) at PAR levels down to 6.5 dB and improves the ACLR, at the PA output, by 20 dB to 30 dB or more. The GC5322 integrates easily into the transmit signal chain between baseband processors such as the Texas Instruments TMS320C64x DSP family and their high-performance Data Converters By Texas Instruments
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GC5322 Application circuits
GC5322 circuits
This is one application circuit of GC5322,If you need more circuits,please download GC5322's pdf datasheet.

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