PROBABILISTIC SIGNAL SHAPING AND CODES THEREFOR |
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| 申请号 | US15374397 | 申请日 | 2016-12-09 | 公开(公告)号 | US20180083716A1 | 公开(公告)日 | 2018-03-22 |
| 申请人 | Alcatel-Lucent USA Inc.; | 发明人 | Joon Ho Cho; Ronen Dar; Peter J. Winzer; | ||||
| 摘要 | We disclose a shaping encoder configured to use a variable-length shaping code to implement fixed-input fixed-output (FIFO) probabilistic signal shaping. In various embodiments, the variable-length shaping code can be a variable-input fixed-output code, a fixed-input variable-output code, or a variable-input variable-output code. The FIFO functionality of the shaping encoder is enabled by a control circuit that operates to: (i) check an output-overflow condition for each bit-word to be encoded using the variable-length shaping code and (ii) switch the shaping encoder from using the variable-length shaping code to using a suitable FIFO code if the output-overflow condition is satisfied. Some embodiments of the shaping encoder can incorporate a conventional FEC encoder in a manner that substantially preserves the shaping gain realized by the shaping encoder. | ||||||
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