PS20251 Datasheet, PDF (3/25 Pages) List of Unclassifed Manufacturers – Dual COFDM demodulator with PID filters and MRC diversity

PS20251
Table of Contents
1 System .................................................................................................................................................... 1
1.1 Features .......................................................................................................................................... 1
1.2 Application ...................................................................................................................................... 2
2 Package Information................................................................................................................................ 6
2.1 Thermal ........................................................................................................................................... 6
2.2 Package Pin Out............................................................................................................................... 6
2.3 Pin definitions.................................................................................................................................. 8
3 Demodulator Functional Description ..................................................................................................... 10
3.1 Analogue-to-Digital Converter ....................................................................................................... 11
3.2 Automatic Gain Control ................................................................................................................. 12
3.3 IF to Baseband Conversion............................................................................................................. 12
3.4 Adjacent Channel Filtering ............................................................................................................. 12
3.5 Interpolation and Clock Synchronisation ........................................................................................ 12
3.6 Carrier Frequency Synchronisation................................................................................................. 12
3.7 Symbol Timing Synchronisation...................................................................................................... 12
3.8 Fast Fourier Transform................................................................................................................... 13
3.9 Common Phase Error Correction.................................................................................................... 13
3.10 Channel Equalisation ..................................................................................................................... 13
3.11 Impulse Filtering ............................................................................................................................ 13
3.12 Transmission Parameter Signalling (TPS) ........................................................................................ 13
3.13 Diversity Combiner ........................................................................................................................ 13
3.14 De-Mapper .................................................................................................................................... 13
3.15 Symbol and Bit De-Interleaving...................................................................................................... 13
3.16 Viterbi Decoder.............................................................................................................................. 14
3.17 MPEG Frame Aligner...................................................................................................................... 14
PLESSEY SEMICONDUCTORS LTD
TAMERTON ROAD | ROBOROUGH | PLYMOUTH | DEVON | PL6 7BQ
3