| 摘要 |
<p>A decoding system is provided as part of a portable radio paging unit which is capable of detecting and storing up to four different alerting signals per user. Each user's pager is uniquely addressable. The decoding system is responsive to a transmission protocol in which the transmission signal includes a preamble to enable bit-synchronization, a recurring synchronization codeword, and one or more address codewords within a batch of codewords transmitted between each synchronization codeword a recurring synchronization codeword separating first, second and subsequent batches of codewords in a plurality of frames, characterised in that the systeme has means for decoding after the receipt of an erroneous synchronization codeword or the loss thereof at its immediate specific decoding frame by virtue of the known time in the transmission between an obtained synchronization codeword immediately before the erroneous or lost synchronization codeword and said specific decoding frame immediately following said erroneous or lost synchronization codeword.</p> |
