Title :
A 70-Mb/s variable-rate 1024-QAM cable receiver IC with integrated 10-b ADC and FEC decoder
Author :
Tan, Loke Kun ; Putnam, Jeffrey S. ; Lu, Fang ; Luna, Lionel J D ; Mueller, Dean W. ; Kindsfater, Kenneth R. ; Cameron, Kelly B. ; Joshi, Robindra B. ; Hawley, Robert A. ; Samueli, Henry
Author_Institution :
Broadcom Corp., Irvine, CA, USA
fDate :
12/1/1998 12:00:00 AM
Abstract :
A 70 Mb/s variable-rate 1024-quadrature amplitude modulated (QAM) cable receiver IC with integrated 10 b analog-to-digital converter (ADC) and forward error correction (FEC) decoder is presented. The chip accepts an analog 2 Vpp differential QAM signal centered at an intermediate frequency. The integrated 10 b ADC digitizes the IF signal, and all subsequent signal processing, including demodulation, timing/carrier recovers, adaptive equalization, and FEC, is performed digitally. The receiver IC is capable of receiving 4, 16, 32, 63, 128, 256, and 1024-QAM modulation formats. The 0.5-μm triple level metal N-well CMOS chip has a complexity of 650 k transistors with a core area of 1.9×4.9 mm2. Power dissipation is 1.8 W at 7 MBaud and 5 V
Keywords :
CMOS integrated circuits; analogue-digital conversion; decoding; forward error correction; quadrature amplitude modulation; receivers; telecommunication cables; 0.5 micron; 1.8 W; 10 bit; 5 V; 70 Mbit/s; ADC; FEC decoder; IF signal digitization; adaptive equalization; analog-to-digital converter; carrier recovery; demodulation; forward error correction; power dissipation; quadrature amplitude modulation; signal processing; timing recovery; triple level metal N-well CMOS chip; variable rate QAM cable receiver IC; Adaptive signal processing; Amplitude modulation; Analog integrated circuits; Analog-digital conversion; Decoding; Digital signal processing chips; Forward error correction; Frequency; Quadrature amplitude modulation; Signal processing;
Journal_Title :
Solid-State Circuits, IEEE Journal of
