In applications of feed - forward linearization technique , the overall amplifier efficiency is significant concerned . giving mathematical analysis and simulation results , the paper present two practical methods to optimize the efficiency of a feed - forward amplifier system 針對前饋線性化技術應用中倍受關注的系統效率問題進行了數學推導和仿真,提出實踐中提高效率的兩種方法及其適用條件。