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Quadrature Phase Shift Keying IP

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  • Configurable Soft Output Demapper
    • Soft output demapper based on the LLR (Log Likelihood Ratio)algorithm.
    • Parameterized number of soft bits per symbol .
    • Parameterized architecture depending on supported modulation levels for optimum resources utilization.
    • Programmable modulation level.
    Block Diagram -- Configurable Soft Output Demapper
  • Mobile Phase Recovering Equalizer
    • 17-tap complex-arithmetic LMS Channel Equalizer with adaptation bandwidth and leakage rate control as well as independent coefficient hold and reset controls
    • VV4 Quasi-Coherent Demodulator for signal phase recovery and differential detection
    • Integrated Symbol Slicer provides demodulated soft-decision outputs
    • AGC output controls in proportional and up/dn format for constant-modulus and phase-locked processing
    Block Diagram -- Mobile Phase Recovering Equalizer
  • ISDB-T Demodulator
    • Full 13-segment ISDB-T demodulator
    • ARIB STD-B31 compliant supporting 1, 2 or 3-layers
    • High-performance demodulation engine for demanding applications
    • Sophisticated channel impairment correction
  • High Data Rate Modulator
    • Versatile digital modulation engine
    • Programmable constellation mapper supports multiple constellations from BPSK to 256QAM
    • Supports offset-QPSK (OQPSK)
    • Supports continuously variable symbol rates
  • High Data Rate Enhanced Demodulator
    • Versatile digital demodulation engine supporting BPSK, QPSK, offset-QPSK (OQPSK), 8PSK, 8QAM* (three variants), 16QAM, 32/64QAM (HDRM-D2 core only) & 16/32APSK (HDRM-D2 core only)
    • Close to theoretical performance
    • Option to increase datapath resolution to help cope with elevated levels of adjacent carrier interference (HDRM-D2 core only)
    • N-stage symbol rate blind adaptive equaliser option reduces linear channel distortions such as multipath (HDRM-D2 core only)
  • ISDB-T Modulator
    • Full 13-segment ISDB-T modulator
    • ARIB STD-B31 compliant operation, supporting one, two or three-layers
    • Flexible transport-stream input interface
    • Test-mode traffic generator
  • DVB-S2 demodulator
    • Support for CCM, VCM and ACM modes.
    • Sync acquisition at -2dB C/N.
    • Wide carrier acquisition range.
    • Programmable symbol rate recovery
  • High Data Rate Demodulator
    • Versatile digital demodulation engine supporting BPSK, QPSK, offset-QPSK (OQPSK), 8PSK, 8QAM* (three variants), 16QAM, 32/64QAM (HDRM-D2 core only) & 16/32APSK (HDRM-D2 core only)
    • Close to theoretical performance
    • Option to increase datapath resolution to help cope with elevated levels of adjacent carrier interference (HDRM-D2 core only)
    • N-stage symbol rate blind adaptive equaliser option reduces linear channel distortions such as multipath (HDRM-D2 core only)
  • Universal QAM/PSK Modulator
    • Continuous or burst-mode operation.
    • Symbol mapping for QAM orders from 2 (BPSK) to 256 (256-QAM) including support for cross, circular (MPSK) and offset (staggered) QAM (e.g. OQPSK).
    • Arbitrary symbol rate at up to one half of the master clock frequency.
    • Register programmable or symbol-by-symbol selection of mapping scheme to support variable-rate and adaptive physical-layer protocols.
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