On Operation of Self-phased Arrays under Conditions of Multipath Propagation
نویسنده
چکیده
This paper gives an analysis of operation of a self-phased array under conditions of multipath propagation (either reflections or jamming signals). A general method for the calculation of directivity of such an array has been proposed. Influence of reflections by way of the pilot signal channel as well as by way of the primary signal channel is taken into account. Some limitations of the approach proposed before have been pointed out and overcome in this paper. It has been shown that an essential reduction in directivity is possible in the case of weak pilot signal or large (close to unity) reflection coefficient.
منابع مشابه
Influence of Pilot Signal on Directivity of Self-Phased Arrays Under Conditions of Multipath Propagation
This paper presents an investigation of a pilot signal influence on directivity of self-phased array under conditions of multipath propagation (either reflections or jamming signals). A suggestion is made that an average reduction in directivity owing to the cutting off (or “dropping out”) of some channels of the array be used as a criterion of this influence. It has been shown that an essentia...
متن کاملDesign of Low Complexity Phased Arrays for Commercial Applications
Recent growth in advanced communication systems has drawn an increasing interest in utilizing phased array technologies. Bandwidth intensive applications such as real-time video streaming and emerging gigabit wireless communications demand higher data rates than ever before. The spatial selectivity of phased arrays can increase the channel capacity and data rate without requiring extra bandwidt...
متن کاملGPS Multipath Mitigation Using a Three Dimensional Phased Array
Digital beam steering with a phased array has previously been demonstrated to improve the Signal/Multipath (S/M) level for precision applications by providing gain in the direction of the GPS satellites. A disadvantage of using horizontal planar antenna arrays is that the beam pattern is symmetric in the Up/Down directions. This means that only the phased array ground plane affects the antenna ...
متن کاملThe Range Increase of Adaptive Versus Phased Arrays in Mobile Radio Systems
In this paper, we compare the increase in range with multiple-antenna base stations using adaptive array combining to that of phased array combining. With adaptive arrays, the received signals at the antennas are combined to maximize signalto-interference-plus-noise ratio (SINR) rather than only form a directed beam. Although more complex to implement, adaptive arrays have the advantage of high...
متن کاملPhase-Only Synthesis of Antenna Arrays Using Nonuniform Phased Sampling Method
Nonuniform Phased Sampling method is proposed to phase-only synthesize the power pattern of both linear and planar antenna arrays. This method modifies the conventional sampling method which is used for amplitude-phase synthesis. This method is based on assigning suitable phases to the sampling points of radiation pattern in order to reach desired amplitude of currents. Some examples are given ...
متن کامل