Low complexity array response vector estimation for smart antenna systemsComplexity, L O WResponse, ArrayEstimation, Vector
Due to the phase differences, the frequency response of each RF channel in phased array and massive MIMO systems differs from the other channel. Moreover, it is time variant in nature. Static factors in the system that can be measured are compensated through factory calibrations. Deployment ...
0:180 (default) | real-valued Q-length vector SpecifyPolarizationPattern— Polarized array response false (default) | true MagnitudePattern— Magnitude of combined antenna radiation pattern zeros(181,361) (default) | real-valued Q-by-P matrix | real-valued Q-by-P-by-L array PhasePattern— ...
Our goal now is to determine the response of the array when steered towards , when the weights are chosen using the equation above. Using the definition of the array factor, we can write: The above can be simplified by recalling the definition of the wave vector: Substituting the above ...
which imposes limitations on the quantity of unit cells that can be utilized. To validate the actual system performance and simulation results, the MIMO antenna incorporating the metamaterial array has been fabricated and tested using a Vector Network Analyzer (VNA), as shown in the Fig.13. The...
Design of 2 × 2 antenna array Based on the structure of the antenna element investigated in the previous section, a 2 × 2 array antenna is designed. Figure6presents the architecture of the array, which can be divided into two layers, namely, Part I and Part II. Four antenna ...
not included in the argument ofaULAsince the response for an ULA is independent of the elevation angle. In contrast, for a uniform planar array (UPA), which is composed ofNvandNhantenna elements in the vertical and horizontal directions, respectively, the array response vector is represented by...
The vectors pr(j) are extracted from EM-simulated antenna response, similarly as the vectors fr(j). As an example, let us consider a dual-band antenna with the operating frequencies being the performance figures of interest. In this case, the vector fr(j) comprises the actual operating ...
In the remaining part of this work, we usefP(x) = [ff(x)TfL(x)T]T, whereff(x) = [ff.1(x) …ff.K(x)]TandfL(x) = [fL.1(x) …fL.K(x)]T, to denote a response feature vector, its horizontal and vertical coordinates, respectively. The feature-oriented merit ...
Note that the received signal is no longer weighted by a steering vector toward a specific direction. Instead, the receiving array weights in this case are given by the complex conjugate of the channel response. Otherwise it is possible that multipath could make the received signal...