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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Simon Yiu Schober, R. Lampe, L. |
| Copyright Year | 2002 |
| Abstract | In this paper, we introduce a new class of distributed space-time trellis codes (DSTTCs) for wireless networks with a large set of decode-and-forward relay nodes N. We consider the general case where each relay node is equipped with NT antennas and the destination node is equipped with NR antennas. It is assumed that at any given time only a small, a priori unknown subset of nodes S ∈ N is active and neither the relay nodes nor the destination node know which relay nodes are active. In the proposed scheme, each node is assigned a signature matrix and the signal transmitted by an active node is the product of the signature matrix and a space-time trellis code (STTC) matrix originally designed for Nc co-located antennas. It is shown that existing full-rank STTCs designed for Nc ⩾ 2 co-located antennas are a favorable choice for the code matrix. Two practical designs for good deterministic signature matrix sets are provided and compared with random signature matrices. If the signature matrices are properly optimized, the proposed DSTTCs achieve a diversity order of d = min{NcNR, NTNSNR} if NS nodes are active. Simulation results confirm that DSTTCs yield significant performance gains over distributed space-time block codes and distributed space-time filtering. Furthermore, equipping relay nodes with a second antenna can be highly beneficial especially if only few nodes can be active at any given time. |
| File Size | 390404 |
| File Format | |
| ISSN | 15361276 |
| Volume Number | 6 |
| Issue Number | 11 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-11-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Decoding Wireless sensor networks Convolutional codes Digital relays Wireless networks Signal design Transmitting antennas Performance gain Block codes Filtering Ad hoc and sensor networks, cooperative diversity, distributed space-time coding, fading channels, relaying, wireless networks |
| Content Type | Text |
| Resource Type | Article |
| Subject | Applied Mathematics Electrical and Electronic Engineering Computer Science Applications |
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