Design Of Anti - Asynchronous Interference MMSE Algorithm For Base Station Cooperative Finite Feedback

Nowadays, with the development of digital and informational age, people have higher requirement for high speed, wide coverage, stable data transmission communication service. The MIMO(Multiple Input Multiple Output) technology with the characteristic of high speed of data transmission, has become one of the key technology to solve the above problems. At the same time, the cooperative communication network covers a wide range and also provides very high speed rate of data transmission for the users who are even in the edge of base stations. It has also become a key technology to solve the above problems. However, each of them just satisfy a part of those requirement. Meanwhile the MIMO cooperative communication technology has the characteristic of high speed transmission in MIMO technology and wide coverage range in cooperative communication. In recent years, wireless communication research gradually turned toward the MIMO cooperative communication.This paper investigates minimum mean square error (MMSE) with asynchronous interference mitigation in cooperative base station systems. We consider the asynchronous transmission because of the different propagation times between the base station (BS) and mobile stations (BSs). Meanwhile, the channel quantization errors due to channel quantization and the interference from inter-users and cooperative stations are taken into account in our analysis. In this paper we firstly study the bit feedback allocation method to decrease traditional interference in some degree, and then under this situation we propose a scheme which is robust to asynchronous interference and channel quantization errors in BSs cooperation systems. Simulations results show that proposed MMSE scheme achieve an improved performance compared with the conventional MMSE in BSs cooperative systems.