发明名称 |
Cryptographic digital signal transceiver method and apparatus |
摘要 |
Hybrid subband coding and decoding (using different encloding/decoding algorithms in at least one subband channel) and subband time delay compensation at a point of maximum digital bandwidth compression are effected so as to reduce required DSP on-chip memory requirements. At the same time a special digital signal format is employed so as to provide enhanced data frame synchronization, enhanced cryptographic synchronization and selective signalling ability within a cryptographic digital signal transceiver. The ability to successfully accomplish late entry (or to re-establish synchronization once lost) into an ongoing received message is provided.
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申请公布号 |
US4817146(A) |
申请公布日期 |
1989.03.28 |
申请号 |
US19840661597 |
申请日期 |
1984.10.17 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
SZCZUTKOWSKI, CRAIG F.;ZINSER, JR., RICHARD L.;KAPPAGANTULA, SATISH;PETERSON, III, EUGENE H. |
分类号 |
H04B1/66;H04K1/00;(IPC1-7):H04K1/04 |
主分类号 |
H04B1/66 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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