GC6016 Datasheet, PDF (4/46 Pages) Texas Instruments – Wideband Transmit-Receive Digital Signal Processors

GC6016
SLWS227A – NOVEMBER 2010 – REVISED MARCH 2011
C6748
DSP
DAC3484
DAC
I/Q
TRF3703/3720
I/Q Mod
I/Q Mod
DAC
I/Q
I/Q Mod
I/Q Mod
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Complex
TX
PA
PA
PA
PA
Baseband
Data
GC6016
DUC-CFR
DDC
ADS61B49
FB
ADC
ADS62P49
RX
ADC
RX
ADC
SW
Mixer/BPF
Subsampled
Feedback
Mixer/BPF
Mixer/BPF
LNA
Real
RX
LNA
ADS62P49
RX
ADC
RX
ADC
Mixer/BPF
Mixer/BPF
LNA
Real
RX
LNA
B0441-02
Figure 4. Four-Antenna-Mode Subsampled Real-Feedback Example Diagram
GENERAL DESCRIPTION
The GC6016 is a wideband transmit and receive signal processor that includes digital
downconverter/upconverter (DDUC), transmit, receive, and capture buffer blocks. The transmit path includes
crest factor reduction (CFR), complex equalization, and bulk upconversion. The receive path includes wideband
and narrowband automatic gain control (AGC), bulk downconversion, complex equalization, and I/Q imbalance
correction.
The architecture supports different RX, TX, and feedback modes of operation. This provides for many
configurations to optimize performance and cost.
• RX – real or complex input
• TX – real, complex, complex with envelope tracking
The RX path can be configured for one or two multichannel ADC input ports. The RX block provides each ADC
channel with a front-end AGC, IQ demodulation correction, real-to-complex conversion, complex mixing,
decimation, and complex equalization. The RX block output is input to the DDUC block. The output of the DDUC
block goes through gain and back-end AGC and is formatted for the baseband output.
4
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