带内分集 meaning in English

in-band diversity

By experimentation , it is shown that time - frequency modulation is efficient and effective , which has rake and fault tolerant capacities in passband . the modem has strong ability of anti - jamming and error - correction which can finish the mission of communication under poor channel qualitative properties
经过实验证明，时频调制是一种简捷有效方法，它具有很好的带内分集接收效果和容错能力，该调制解调器在信道质量很差的条件下，仍能完成数据通信的任务，具有很强的抗干扰和纠错能力。