Recommended forward link powers 推荐的前向链路功率 %o of MaxPwr Watts (MaxPwr=15W) Pilot 13% 1.95W 导频 aging 5%(Halfrate 0.75W 寻呼 10%(full-rate) 1.5W S 290 0.3w 同步 Max Traffic Lower /Upper 1%/13% 0.15W/1.95W 最大业务量低的篇高的 CDMA Technology and Side《# Telstra Operations for Unicom Senior CDMA Radio Design Principles Telstra 2001 Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 16 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Recommended Forward Link Powers 推荐的前向链路功率 % of MaxPwr Watts (MaxPwr = 15W) Pilot 导频 13 % 1.95 W Paging 寻呼 5% (Halfrate) 10% (full-rate) 0.75 W 1.5 W Sync 同步 2% 0.3 W Max Traffic Lower / Upper 最大业务量低的/高的 1% / 13% 0.15 W / 1.95W
Power and digital Gain 功率和数字增益 Powers in most CDMA BTS are set using"Digital Gain"parameters and values 在很多CDMA BTS中功率是用“数字增益”参数和值来设置的 Digital gains are used internally in the bts demodulator chipsets(CSMs), and also externally in the bsc to control bTS power (eg forward link power control) 数字增益内用在解调器 码片组(CSM)中,而且外用在BsC以控制BTS功率(如前向链路功率控制) W I Short Code ∑ sino t HPA Q Short Code cos(o t Digital Gains 数字增益 CDMA Technology and Side《# Operations for Unicom Senior CDMA Radio Design Principles Telstra 2001 Telstra Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 17 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Power and Digital Gain 功率和数字增益 • Powers in most CDMA BTS are set using “Digital Gain” parameters and values 在很多CDMA BTS 中功率是用“数字增益” 参数和值来设置的 • Digital gains are used internally in the BTS demodulator chipsets (CSMs), and also externally in the BSC to control BTS power (eg forward link power control) 数字增益内用在解调器 码片组(CSM) 中, 而且外用在BSC 以控制BTS 功率(如前向链路功率控制) Q Short Code I Short Code S cos(wc t) sin(wc t) HPA G0 G64 W0 W63 Digital Gains 数字增益
Digital Gains 数字增益 Digital Gain values take on integer values 数字增益值是整数 Typicall!G=0,2,4.…254 典型的G=0,2,4…254 Digital Gain values are voltage gains and map to the power domain as follows 数字增益值是电压增益并映射到功率域如下所示: P= K 254 K is known as the "calibration setpoint or constant", and maps digital gain to a power at some reference point (usually at the btS output K是“校准设置点或常数”,并映射数字增益到位于一些参考点(通常是 BTS输出)的功率值上。 CDMA Technology and Side《# CDMA Radio Design Principles Telstra 2001 Telstra Operations for Unicom Senior Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 18 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Digital Gains 数字增益 • Digital Gain values take on integer values 数字增益值是整数 • Typically G = 0,2,4...…254 典型的 G = 0,2,4......254 • Digital Gain values are voltage gains and map to the power domain as follows: 数字增益值是电压增益并映射到功率域如下所示： • K is known as the “calibration setpoint or constant”, and maps digital gain to a power at some reference point (usually at the BTS output). K是 “校准设置点或常数” ，并映射数字增益到位于一些参考点（通常是 BTS输出）的功率值上。 2 1 1 254 * = G P K
Channel powers 信道功率 Pilot gain Pilot Pwr kK 254 Paging Pwr Paging Gain 2 K 254 2 r SyncGain SynchPwr K 254 Digital Gains can also be used to set thresholds for admitting new calls and handoffs(nortel and ericsson only 数字增益也可 以用来为接听新的呼叫和切换(仅 Nortel和 Ericsson适用)设置门限 CDMA Technology and Side《# Telstra Operations for Unicom Senior CDMA Radio Design Principles Telstra 2001 Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 19 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Channel Powers 信道功率 SynchPwr K PagingPwr K PilotPwr K = = = 2 2 2 254 254 254 SyncGain PagingGain PilotGain • Digital Gains can also be used to set thresholds for admitting new calls and handoffs (Nortel and Ericsson only) 数字增益也可 以用来为接听新的呼叫和切换 (仅Nortel 和 Ericsson 适用) 设置门限
Digital Gain Example 数字增益实例 Assume that(假设)DG=25424W ie.(即)(254/254)2*K=4 K=4 Channel Digital Gain Power at BTS output 信道 数字增益 在BTS输出的功率 Pilot 150 4*(150/254)2=14W 导频 P ng 70 0.3W 寻呼 Synch 0.15W 同步 CDMA Technology and Side《# Operations for Unicom Senior CDMA Radio Design Principles Telstra 2001 Telstra Managers Telstra in confidence Making life easier
Advanced Learning Solutions Slide No. 20 Slide ‹#› Telstra © 2001 Telstra in confidence CDMA Technology and Operations for Unicom Senior Managers CDMA Radio Design Principles Digital Gain Example 数字增益实例 Assume that（假设）DG= 2542 4 W i.e.（即） (254/254)2 *K = 4 K = 4 Channel 信道 Digital Gain 数字增益 Power at BTS output 在 BTS 输出的功率 Pilot 导频 150 4*(150/254)2= 1.4 W Paging 寻呼 70 0.3 W Synch 同步 50 0.15 W