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提出了一种基于新型算法SGLMS-CMA的高速QAM均衡器.SGLMS-CMA算法在stop-and-go原理指导下结合了经典CMA算法和DD-LMS算法.MATLAB仿真表明,与经典CMA算法相比,新型算法具有收敛速度快5倍,剩余MSE改善3～5dB,运算复杂度减少了82%,可纠正残留相偏的优点.综合结果表明,采用SGLMS-CMA+DD-LMS的新型均衡器与CMA+DD-LMS均衡器相比,系统中均衡器模块的硬件开销只增加5%.最后使用SMIC0.18μm工艺库对新型均衡器进行综合,并且嵌入到QAM解调芯片中进行流片,最终测试结果表明新型均衡器性能优越.
A new high-speed QAM equalizer based on the new algorithm SGLMS-CMA is proposed.SGLMS-CMA algorithm combines classical CMA algorithm and DD-LMS algorithm under the principle of stop-and-go principle.MATLAB simulation shows that compared with the classical CMA algorithm , The new algorithm has the advantages of fast convergence rate of 5 times, the remaining MSE improved by 3 ~ 5dB, the computational complexity reduced by 82%, and the residual phase deviation can be corrected.The comprehensive results show that the new equalizer with SGLMS-CMA + DD-LMS Compared with the CMA + DD-LMS equalizer, the hardware overhead of the equalizer module in the system is only increased by 5%. Finally, the SMIC0.18μm technology library is used to synthesize the new equalizer and embedded in the QAM demodulator chip for streaming, finally The test results show that the new equalizer performance is superior.