SIMO System ADOA/TDOA Positioning And The Performance Analysis Over Fading Channel

With the development of communication there are more demands of communication capacity. SIMO and SOMI system as a combination of two special way of MIMO system, it inherited many of the features of MIMO system. As a result of these two systems to receive or end of the antenna system is a single antenna system. Considering antenna design in the current level it is very suitable for small volume use of the mobile terminal. In this paper, combined with the actual subject of the 863 project will focus on the needs of SIMO and SOMI system performance and position in detail. At the same time, as a result of these two systems of inheritance of the MIMO system, we will hold a general formula of the MIMO system, and then complete the SIMO and SOMI system performance analysis.MIMO system breaks the traditional limit. The capacity of communication system become large with the number of antenna increasing. The large of capacity of communication can provide more redundancy for coding. So we can develop the reliability of communication. The MIMO system constructed with two important points. One is antenna system and another is coding system.Because of multiple antennas system we should consider the character of the antennas when designing or analyzing the system. Especially it is a full of challenge work when we want to design a small multiple antennas in a small area.The amid of Space-Time Coding is to gain the most plus of space with the MIMO system. To achieve the plus of space there are several method. Such as BLAST, ZF, MMSE and ML. ML has a wonderful performance in coding work with a complexity. It can't satisfy real time using. Balancing two aspect of performance and complexity is BLAST. Multipath effect is taken as a bad factor in the wireless communication. But in the MIMO system, we can change the bad factor effect, and we can make a good use of the decline channel. Multiple antennas send signals, and the receivers receive the signals over the multipath. We can use some arithmetic to change the bad factor into the useful factors. So we can get a wonderful performance.This paper construct a SIMO system consider the need of the subject based on a rice channel. There are 3 important works, one is to increase the range of signal without increasing the power, another is to increase the capacity of system in a far distance, the last is to use the existing equipments to locate position.This paper brings forward a new way named C-SIMO to improve SIMO system. Estimate a parameter K to send the message in the different circumstances on the basis of C-SIMO system. It can make a higher performance to the important information.