Adaptive Modem from 4-QAM to 1024-QAM "E-band"
Overview
The Binary Core modulation scheme bc011, "E-Band", is specifically designed to operate in 250 MHz channel spacing for E-Band applications. All square and cross modulation formats from 4- up to 1024-QAM are supported. A finely tuneable coding scheme allows to optimize the trade-off between throughput and error performance.
Key Features
- Eight modulation formats (4-, 16-, 32-, 64-, 128-, 256-, 512-, and 1024-QAM).
- Up to 2 Gbit throughput in 250 MHz channel spacing.
- Adaptive modulation switching based on channel measurement and internal service channel signalling.
- Latency independent of the modulation format.
- Byte interface compatible with both asynchronous and synchronous data flow.
- Finely tuneable symbol frequency.
- Only one external clock source required for the FPGA, with frequency in the range 225-250 MHz.
- Polynomial predistortion.
- TX and RX I/Q impairments recovery (amplitude and phase unbalance).
- Timing recovery with digital re-sampling.
- Carrier recovery with pilot symbols for improved robustness to phase noise.
- Automatic frequency recovery for fast carrier acquisition.
- 20-tap adaptive fractionally spaced equalizer.
- Finely tuneable multilevel coding scheme based on inner punctured convolutional and BCH codes, and concatenated Reed-Solomon code, with mapping by set partitioning.