|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||375/39 ; 340/347DD ; 375/59|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 29 인용 특허 : 4|
An input bit sequence is encoded for transmission on a QAM carrier by dividing a scrambled version of the input sequence into groups of N consecutive bits. Each group is then subdivided into first and second subsets of r and r1 bits, where r+r1=N. At least one of the bits in the first subset is applied to a finite state machine (such as a convolution encoder) which is arranged to expand the applied bits by at least one additional bit, in accordance with a prescribed logic arrangement. At least one bit in the second subset is processed similarly but indep...
Apparatus for encoding a sequence of input bits for transmission via a quadrature amplitude modulated carrier signal, comprising: means responsive to first and second subsets of selected bits in each group of N consecutive ones of said input bits for forming first and second expanded versions of the bits in each of said first and second subsets, respectively, each of said expanded versions having at least one more bit than the subset from which it is formed, and means individually responsive to said first and second expanded versions for modulating in-ph...