Abstract
In this paper, we evaluate the total ergodic capacity of channels in an ad-hoc cognitive radio network under interference constraint at the primary users. It is assumed that all links associated with primary and secondary networks experience Rayleigh fading. First, interference from only primary transmitters is discussed. In such case, the optimum power allocation scheme and the ergodic capacity are derived under average interference power constraint. This paper is also extended to include the impact of interference from both primary transmitters and other secondary transmitters. Then, we propose the iterative algorithm to maximize the total capacity due to non-convexity of the objective function. The effect of different types of interference is investigated via numerical analysis.
| Original language | English |
|---|---|
| Title of host publication | Vehicular Technology Conference (VTC Fall), 2012 IEEE |
| Pages | 1-5 |
| Number of pages | 5 |
| DOIs | |
| Publication status | Published - 2012 |
Keywords
- Rayleigh channels
- ad hoc networks
- cognitive radio
- iterative methods
- radio transmitters
- radiofrequency interference
- Rayleigh fading
- ad-hoc cognitive radio network
- average interference power constraint
- interference constraint
- interference evaluation
- iterative algorithm
- numerical analysis
- optimum power allocation scheme
- primary network
- primary transmitter
- secondary network
- total ergodic capacity evaluation
- Ad hoc networks
- Cognitive radio
- Fading
- Interference
- Optimization
- Radio transmitters
- Receivers