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LTE BW 10MHz LTE BW 20MHz
www.netmanias.com Netmanias ONE-SHOT
March 2014
0
B=7
0 1
260.42ns
W=15
CPRI Overhead = Control ...
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Required CPRI link capacity in function of radio technologies

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Required CPRI link capacity in function of radio technologies

  1. 1. LTE BW 10MHz LTE BW 20MHz www.netmanias.com Netmanias ONE-SHOT March 2014 0 B=7 0 1 260.42ns W=15 CPRI Overhead = Control word (8bits) CPRI Payload = IQ Data Block (120bits) 8B/10B encoding CPRI link (Option 1: 614.4Mbps) n I/Q sample data rate in function of radio technologies n CPRI option 1 basic frame structure (128bits/260.42ns) n CPRI basic frame structures per option n CPRI link capacity per option Sampling frequency Sampling bit-width for I/Q samples LTE BW 10MHz LTE BW 20MHz 15.36MHz (65.10 nsec) 30.72MHz (32.55 nsec) 30 bits 30 bits I/Q sample data rate per antenna 0.4608Gbps (=30bitx15.36MHz) 0.9216Gbps (=30bitx30.72MHz) Antenna Configuration 2x 4x 8x 1x 1.8432Gbps (=2x0.9216G) 3.6864Gbps (=4x0.9216G) 7.3728Gbps (=8x0.9216G) 0.9216Gbps (=1x0.9216G) 0.9216Gbps (=2x0.4608G) 1.8432Gbps (=4x0.4608G) 3.6864Gbps (=8x0.4608G) 0.4608Gbps (=1x0.4608G) LTE RF Antenna Sampling 001100101100010 101010111001001 Q sample data OFDMsymbolwaveform t t I waveform Q waveform I sample data 15 bits 15 bits 65.10 nsec Baseband Digital IC LTE RF Antenna Sampling 001100101100010 101010111001001 Q sample data t t I Q I sample data 15 bits 15 bits 32.55 nsec Baseband Digital IC LTE BW 10MHz Antenna Configuration 2x 4x 8x 1x Option 2: 1.2288Gbps/0.9216Gbps R Option 3: 2.4576Gbps/1.8432Gbps Option 5: 4.9152Gbps/3.6864Gbps Option 1: 0.6144Gbps/0.4608Gbps R n Required CPRI link capacity in function of radio technologies 1.2288Gbps 2.4576Gbps 3.0720Gbps CPRI Rate (After 8B/10B) 614.4Mbps 2 4 5 # of option1 basic frames/1 chip (260.42ns) 1 CPRI Option 2 3 4 1 6.1440Gbps 9.8304Gbps 10.1376Gbps 4.9152Gbps 10 16 20 8 6 7 8 5 240 480 600 Length of payload [bit] 120 1200 1920 2400 960 16 32 40 Length of CW [bit] 8 80 128 128/160 64 921.6Mbps 1.8432Gbps 2.3040Gbps Payload rate 460.8Mbps 4.6080Gbps 7.3728Gbps 9.2160Gbps 3.6864Gbps 983.0Mbps 1.9661Gbps 2.4576Gbps Including CW 491.5Mbps 4.9152Gbps 7.8643Gbps 9.8304Gbps 3.9322Gbps 8bi t 16 bit 32 bit CPRI Payload = 120bits CPRI Payload = 240bits CPRI Payload = 480bits 64 bit 260.42ns 15bit 15bit 260.42ns CPRI Payload = 960bits 15bit 260.42ns 15bit 260.42ns Option 1 Option 2 Option 3 = 4 x Option 1= 2 x Option 1 Option 5 = 8 x Option 1 B B B BIP 37.5Mbps IP 75Mbps IP 150Mbps IP 300Mbps LTE BW 20MHz Option 3: 2.4576Gbps/1.8432Gbps Option 5: 4.9152Gbps/3.6864Gbps Option 7: 9.8304Gbps/7.3728Gbps Option 2: 1.2288Gbps/0.9216Gbps B B B BIP 75Mbps IP 150Mbps IP 300Mbps IP 600Mbps B BBU R RRH Antenna R R R R R R I/Q sample data rate per antenna = 460.8Mbps I/Q sample data rate per antenna = 921.6Mbps I/Q sample data rateRequired CPRI link capacity

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