高分求一段汉译英，用软件直接翻译的勿扰。

With the development of science and technology, now in many areas of need to know the exact direction of useful signal, the frequency of parameters, the precise measurement of the signal to put a very high demand. Spectrum space technology in many areas has been widely used, and array signal processing plays a very important role.
Often, the signal space is measured up to one direction Wei Boda (DOA) estimates. In practical applications, often at the same time to signal the number of parameters of the estimates, such as signal DOA, pitch angle and frequency. This paper first introduced for the two-dimensional space spectrum of the estimated MUSIC algorithm, ESPRIT algorithm for the basic idea and principle of algorithm, and then focus on the two algorithms based on the position - two-dimensional frequency spectrum estimation. Then this paper were used MATLAB language MUSIC algorithm and ESRPIT algorithm estimated two-dimensional and computer simulation results are analyzed and compared.

This paper first introduced the concept of radio frequency identification technology, the rise and development. Radio frequency identification system with the basic structure and principles, described the antenna transceiver and the working principle of the process. Subsequent analysis of the transmitting power, receive power chip, chip power consumption and receiving antennas to receive the echo of the relationship between power and to examine in detail the chip to receive power and receiving antennas to receive the echo power as a range of changes, as well as the decision The size of these power factors, the actual design of radio frequency identification hardware to provide reference data

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就是，很霸道

以我的愚见 分少了

太高难度！！！