Evaluation of New Trellis Coded Modulation Schemes for Nextage Mobile Communications

下一代移动通信新网格编码调制方案的评估

• 批准号: 06452241
• 负责人: KASAHARA Masao
• 金额: $ 2.37万
• 依托单位: Kyoto Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452241/
• 关键词: Trellis Coded Modulation; Mobile Communication; Multi Dimensional Encoder; pi; 4-shift QPSK; Design of Signal Points; Convolutional Code; Viterbi decoder; Parallel path

A new design method, which is referred to as the matched design method, for concatenated trellis-coded modulation (TCM) is presented. Most of the conventional concatenated TCM employs TCM designed by maximizing the minimum squared Euclidean free distance, d^2_e. With the matched design method, we maximize d^2_ (t) instead of d^2_e, where d^2_ (t) is the effective minimum squared Euclidean distance (MSED) when the outer code has a t-error correcting capability. The effective MSED is derived from the Euclidean/Hamming (E/H) joint weight distribution of terminated TCM.The new classes of 2-dimensional (2D) codes are found by a computer search. Under the performance measures of the effective MSED or the effective multiplicity, these codes are superior to the conventional codes such as the Ungerboeck's codes when those are used as an inner code.

提出了一种级联网格编码调制（TCM）的新设计方法，称为匹配设计法。大多数传统的级联TCM采用通过最大化最小平方欧几里德自由距离d^2_e来设计的TCM。采用匹配设计的方法，我们最大化d^2_（t）而不是d^2_e，其中d^2_（t）是当外码具有t-纠错能力时的有效最小平方欧几里德距离（MSED）。从终端TCM的Euclidean/Hamming（E/H）联合重量分布导出了有效MSED。通过计算机搜索找到了新的二维码类。在有效MSED或有效多重数的性能指标下，这些码作为内码时上级传统的Ungerboeck码。

项目成果

T. Wadayama,K. Wakasugi,M. Kasahara: "High rate binary coset code used for inner code" IEICE Trans. Fundamentals. E78-A,8. 1034-1041 (1995)

T.和田山，K.

T. Wadayama,K. Wakasugi,M. Kasahara: "An 8-Dimensional Trellis-Coded 8-PSK with Non-zero Crossing Constraint" IEICE Trans. Fundamentals. E77-A,8. 1274-1280 (1994)

T.和田山，K.

T. Wadayama,K. Wakasugi,M. Kasahara: "Multi-Dimensional Block Shaping" IEICE Trans. Fundamentals. E78-A,8. 1034-1041 (1995)

T.和田山，K.

K.Wakasugi, N.Minami, M.Kasahara: ""A lattice quantized coded modulation"" Proc.of ISNCR. 295-298 (1994)

K.Wakasugi、N.Minami、M.Kasahara：““晶格量化编码调制””Proc.of ISNCR。

T.Wadayama, K.Wakasugi, M.Kasahara: ""Multi-Dimensional Block Shaping"" IEICE Trans.Fundamentals. E78-A,8. 1034-1041 (1995)

T.Wadayama、K.Wakasugi、M.Kasahara：““多维块塑造””IEICE Trans.Fundamentals。