Except , the error model of orthogonal modulation and double frequency technology were studied . third , the design and implementation of ultra wide band lfm generator were studied . an ultra wide band lfm pulse compression signal generator with 400mhz carrier and 300mhz absolute bandwidth was developed successful ?第三部分在理論分析的基礎上對超寬帶lfm信號源系統的設計和實現技術進行研究,成功研制出了中心頻率為400mhz ,帶寬為300mhz ,重復頻率為1khz ,脈寬為20 s的線性調頻信號。