Title :
Pilot symbol assisted modulation using encoder tail bits
Author_Institution :
Dept. of Mobile Telecommun., ETRI-Radio & Broadcasting Technol. Lab., Taejon, South Korea
Abstract :
We propose more efficient pilot symbol assisted modulation (PSAM) method than conventional ones in data transmission rate. It can be applied to a PSAM system that adapts convolutional encoding (constraint length K, code rate 1/R) as the error control code. In the proposed PSAM scheme, we select one of R generator polynomials of a convolutional encoder, and choose encoder tail bits to satisfy that their encoded symbols are always zeros (or ones). By using them as pilot symbols, a higher transmission rate is achieved
Keywords :
cellular radio; convolutional codes; digital radio; modulation; polynomials; PSAM system; code rate; constraint length; convolutional encoding; data transmission rate; digital cellular system; encoded symbols; encoder tail bits; error control code; generator polynomials; pilot symbol assisted modulation; Baseband; Convolution; Convolutional codes; Decoding; Encoding; Error correction; Fading; Polynomials; RF signals; Tail;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4872-9
DOI :
10.1109/PIMRC.1998.734690
