摘要
TD-SCDMA系统中,为了满足直放站的覆盖范围,避免直放站对系统的干扰,甚至引起切换失败,信号的总传输时延必须满足一定的要求。根据直放站的实际应用形式,提出了计算TD-SCDMA直放站传输时延的系统模型,计算了光纤、电缆和空气介质的传输时延。根据TD-SCDMA系统上行同步检测对最大时延的要求和联合信道检测技术对时延差的要求,给出了施主链路、分配链路的最大距离计算公式。
In TD-SCDMA system, the overall transmission delay of repeater must be less than a limited value. Otherwise, the coverage of the repeater would not reach the requirement, or the repeater would interfere with TD-SCDMA system, or even handover failure may occur. According to practical system, a model for calculating the repeater transmission delay in TD-SCDMA system is proposed. Transmission delay in different transmission media is calculated. According to the requirement of upward synchronization detection and the requirement of associated channel detection technique in TD-SCDMAsystem, formulations are suggested for the max distance of receiving link and distribution link.
出处
《通信技术》
2008年第3期40-42,共3页
Communications Technology
