发明名称 |
SIMULTANEOUS ANALOG AND DIGITAL COMMUNICATION USING FRACTIONAL RATE ENCODING |
摘要 |
Simultaneous Analog and Digital Communication Using Fractional Rate Encoding Digital data is encoded using a modulus m converter 700 to produce fractionally encoded words, where m is the nearest integer larger than 2c and c is a noninteger. The fractionally encoded words are mapped into a symbol constellation having m symbols to produce a two dimensional data signal 62, 63. The data signal is added to a two dimensional analog signal, which was obtained by encoding an input analog signal, to produce a combined two dimensional signal. The combined signal is modulated using QAM and then transmitted over a communication channel.(FIG. 17).
|
申请公布号 |
CA2121936(A1) |
申请公布日期 |
1994.12.15 |
申请号 |
CA19942121936 |
申请日期 |
1994.04.22 |
申请人 |
AMERICAN TELEPHONE AND TELEGRAPH COMPANY |
发明人 |
BETTS, WILLIAM L.;BREMER, GORDON |
分类号 |
H04J7/00;H04L27/34;(IPC1-7):H04M11/06;H03M7/00 |
主分类号 |
H04J7/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|