一篇非常实用的无线通信方向的文献，是关于cdma系统中doa估计的经典-The use of antenna arrays in wireless communications

makes it possible to estimate the directions of arrival (DOAs)

of impinging waveforms. The latter can be exploited to enhance

channel estimation accuracy or as an input for advanced mobile

positioning systems. In this paper, we consider the uplink of a

multicarrier code-division multiple-access (MC-CDMA) network

in which the base station is endowed with multiple receiving antennas

arranged in a uniform linear array. Transmission takes place

over a multipath channel, and the goal is the joint estimation of

the channel responses and DOAs of the uplink signals. In doing so,

we follow a maximum-likelihood (ML) approach and assume that

users transmit orthogonal training sequences to facilitate the task

of separating the signals. This way, all unknown parameters are

estimated independently of each other with affordable complexity.

Theoretical analysis and computer simulations are used to assess

the performance of the propose