This thesis investigates cooperative communication under the framework of cognitive
radio network, which consists of primary and secondary users(PU & SU). The
cooperative and cognitive radio network (CCR) adopts overlay dynamic spectrum
access, That is, the SU simultaneously assists PU¡¦s transmission and transmits its own
message using spectrum shared by primary user. The secondary user adopts
decode-and-forward (DF) relaying to assist the primary user in transmitting message.
With secondary user¡¦s assistance, the cooperative system can be treat as an equivalent
multiple input single output (MISO) system to attain the spatial diversity of the primary
user. The virtual MISO system can reduce the outage probability and enhance the
transmission reliability. Under the requirement on primary user's transmission quality,
secondary user transmits both user¡¦s signals simultaneously, so that the secondary
acquires authority to access spectrum. Based on limited feedback regarding SNR of link
between primary transmitter and receiver, secondary user allocates transmission power
of primary signal and secondary signal to increase throughput and spectrum efficiency
of SU subject to satisfying PU¡¦s outage constraint.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0803112-183534 |
| Date | 03 August 2012 |
| Creators | Li, Jia-Chi |
| Contributors | Chao-Kai Wen, Kuei-Chiang Lai, Wan-Jen Huang, Fan-Shuo Tseng, Tsang-Yi Wang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0803112-183534 |
| Rights | user_define, Copyright information available at source archive |
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