| Publisher | 3Com | ||
|---|---|---|---|
| Format | 1.2MB PDF, requires Acrobat Rdr 5 | Date added | 15 Feb 2000 |
| Topics | TDMA - CDMA | ||
| Downloads | 343 | ||
This paper considers a wireless network with beam forming capabilities at the receiver, which allows two or more transmitters share the same channel to communicate with the base station. The concrete computational complexity and algorithm structure of a base station is considered in terms of a software radio system model, initially with an omni-directional antenna. The software radio computational model is then expanded to characterize a network with smart antennas. The application of the software antenna is demonstrated through two examples. First, traffic improvement in a network with smart antenna is considered and the implementation of a hand-off algorithm in the software radio is presented. The blocking probabilities of the calls and total carried traffic in the system under different traffic policies are derived. The analytical and numerical results show that adaptive beam forming at the receiver reduces the probability of blocking and forced termination of the calls and increases the total carried traffic in the system. Then, a joint beam forming and power control algorithm is implemented in a software radio smart antenna in a CDMA network. This shows that by using smart antennas, each user can transmit with much lower power and therefore the system capacity increases significantly.
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