Direct Down-Conversion System with I/Q Correction
TIDA-00078
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Description

The I/Q Correction block implemented in the Field Programmable Gate Array (FPGA) of the TSW6011EVM helps users to adopt a direct down conversion receiver architecture in a wireless system. The I/Q correction block consists of a single-tap blind algorithm, which corrects the frequency-independent I/Q imbalance in a complex zero-IF receiver system. Along with the I/Q correction block, the FPGA includes a digital gain block, a digital power-measurement block, x2 of interpolation block, an I/Q offset correction block, and a quadrature mixing block.

Features
  1. Direct Down conversion receiver signal chain with automatic IQ correction
  2. Includes TRF371125 IQ demod for direct conversion to baseband
  3. ADS5282 to capture the IQ receive signal for IQ processing
  4. Automatic blind IQ correction IP example provided on Altera Cyclone III FPGA

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Schematic/Block Diagram

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Design Files

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TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS5282  Eight-Channel, 12-Bit, 65-MSPS Analog-to-Digital Converter (ADC)  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
CDCE62005  5/10 Outputs Clock Generator/Jitter Cleaner with Integrated Dual VCO  Clocks & timing  Sample & Buy View Design Kits & Evaluation Modules
DAC5672  Dual-Channel, 14-Bit, 275-MSPS Digital-to-Analog Converter (DAC)  Digital-to-analog converters (DACs)  Sample & Buy View Design Kits & Evaluation Modules
TPS54610  3V to 6V Input, 6A Synchronous Step-Down Converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS760  50-mA, 16-V, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS767  1-A, 10-V, low-dropout voltage regulator with enable & RESET with delay  Power management  Sample & Buy Not Available
TRF371125  0.7 - 4.0 GHz Wide Bandwidth Integrated Direct Down Conversion Receiver  Mixers & modulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS5282 Download Download
CDCE62005 Download Download
DAC5672 Download Download
TPS54610 Download -
TPS760 Download Download
TPS767 Download Download
Download -
TRF371125 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 2311 23 Jul 2013
Design files (3)
Title Type Size (KB) Date
ZIP 2213 09 Jun 2014
PDF 68 09 Jun 2014
PDF 349 11 Jul 2013

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