LMS Adaptive Channel Equalizer

Overview

Key Features

• 17-tap T-spaced complex-arithmetic LMS signed-error Channel Equalizer
• Adaptation bandwidth control (mu, step size)
• Leakage rate control (forgetting factor)
• Coefficient hold control (adaptation freeze)
• Coefficient reset control
• IQ channel and cross-tap coefficient readout
• Center taps are fixed for phase stability
• Multiplexed architecture minimizes resource utilization. Requires only 17 DSP48 blocks.
• Clock rates up to 548 MHz supported
• Symbol rates up to 1/5 of clock rate

Benefits

• Restores link performance in the presence of common channel impairments such as multipath reflections, cable tilt, filter distortion, or other effects
• Includes full readout capability of complex tap coefficient values for channel analysis
• Low complexity for hardware and power efficiency
• Adaptation rate control provides flexibility

Block Diagram

Applications

• Single-carrier Communication Links
• Terrestrial Microwave Links
• Cellular Backhaul
• Cable Modems
• Point-to-Point or Point-to-Multipoint systems

Deliverables

• Product License
• EDIF or NGC core
• Verilog Test Bench
• Supporting Matlab/Octave code for test vector generation and analysis
• Verilog simulation model
• Product Documentation

Technical Specifications