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As a manner of communications with the high spectral and energy efficiency, cognitive underwater acoustic communications based on index modulation (CUAC-IM) have been investigating by us in more recent years. Like other communication system, estimation algorithm on frequency offset (FO) caused by the relative motion of mobile station is crucial to CUAC-IM system. In this paper, system model, especially...
In order to achieve high performance IP address lookup and a specified circuit suitable for onboard IP switch, through the analysis and comparison of the existing onboard routing search algorithms, this paper put forward a novel IP address routing lookup algorithm, which called two-layer compressed trie search algorithm. This algorithm could not only implement “one-to-one” unicast satellite routing...
By exchanging soft information between the detector and the channel decoder, an iterative receiver can significantly improve the performance compared to the non-iterative receiver. In this paper, a low complexity soft-input soft-output (SISO) fixed-complexity sphere decoding (FSD) algorithm is proposed for iterative MIMO receiver. The algorithm introduces a simplified parallel candidate adding (SPCA)...
People usually adopt DSP and ARM for the signal gathering and processing. But many functions of DSP and ARM complete depending on software, the entire software's movement needs to account for the sampling time a part and they can't control complex periphery hardware circuit logic very well. Those Cause them having very big flaw in high speed data gathering and processing. A Field-programmable Gate...
The recursive least squares algorithm (RLS) is realized in MATLAB. Simulation results show that forgetting factor influences the algorithm convergence and stability, which will significantly affect the performance of adaptive filter. Therefore, a variable forgetting factor RLS algorithm is presented in this paper. Simulation results show that the convergence and stability of the variable forgetting...
An improved variable tap-length least mean square(LMS) algorithm is proposed in this paper. As compared with the original fractional tap-length LMS (FT-LMS) algorithm, the proposed algorithm can obtain both a fast convergence rate and a small steady-state error of the tap-length. Algorithm analysis is given which also provides a guideline for choosing the parameter of the proposed algorithm. Simulations...
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