发射方向调制信号的多波束调制技术

为了使单天线接收机通过接收解调信号能实现通信和方向测量功能,提出了一种多波束调制的概念.它利用双波束或多波束的空间特性来实现数字调制和方向调制.设计了一个六元线天线发射阵列,将中间的四元天线两两成对激励,形成双波束,用双波束调制实现数字通信和方向粗测,然后对大间距的二元天线用不同的相差激励,形成有错位的多波束,用多波束调制实现数字通信和方向精测.仿真结果表明这种多波束调制实现了在调制信号设计层面上的数字通信与测向的深度综合.

Multiple Beam Modulation to Transmit the Signal Modulated by Directional Information

This paper presents a new concept of multiple beam modulation to transmit data and directional information, so that the receiver with only an antenna can perform communication and direction- finding from demodulating signals. The antenna array with six dipole elements is designed, in which two pairs of elements in the center transmit the signal with two beams modulation in order to measure the azimuth approximately. The other pair of dipole antennas spaced apart widely are fed by the sources with different carrier phases, and transmit the signals with multiple beam modulation to estimate the azimuth accurately. Simulation results show that the system has been successfully designed to integrate digital communication with direction-finding in term of signal modulation.