ZTE Corporation ZXMBW-R9100 用户手册
Chapter 3 Protocol Interface Description
F
IGURE
20 M
ASTER
F
RAME
F
ORMAT
The master frame under the 3 rate levels is 10 ms. The line rate is:
(I * 768000/10 ms) * 8 * 10/8 = I * 768 Mbps. For 1x, 2x and 4x,
the rate are 768 Mbps, 1536 Mbps and 3072 Mbps respectively.
(I * 768000/10 ms) * 8 * 10/8 = I * 768 Mbps. For 1x, 2x and 4x,
the rate are 768 Mbps, 1536 Mbps and 3072 Mbps respectively.
The usual optical modules are of 1.25 G and 2.5 G and cannot
suit the above values. Therefore, the standard rate of OBSAI is
adjusted to M_MG = 42, K_MG = 2, N_MG = 768 to realize the 1x
rate of 614.4 Mbps, 2x rate of 1228.8 Mbps and 4x rate of 2457.6
Mbps. Therefore, transmission can be realized in 1.25 G and 2.5
G optical modules.
suit the above values. Therefore, the standard rate of OBSAI is
adjusted to M_MG = 42, K_MG = 2, N_MG = 768 to realize the 1x
rate of 614.4 Mbps, 2x rate of 1228.8 Mbps and 4x rate of 2457.6
Mbps. Therefore, transmission can be realized in 1.25 G and 2.5
G optical modules.
Baseband-RF Interface Physical
Layer
Layer
Overview
The physical layer of the baseband-RF interface is based on differ-
ential signaling technology. Differential signaling with clock data
recovery circuit provides high-speed serial data transmission be-
tween the RF and baseband modules. It also helps reduce power
consumption and increases system reliability.
ential signaling technology. Differential signaling with clock data
recovery circuit provides high-speed serial data transmission be-
tween the RF and baseband modules. It also helps reduce power
consumption and increases system reliability.
Features
The features of the baseband-RF interface physical layer are:
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Adaptive Modulation and Coding (AMC)
�
Fast channel feedback
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Mutiple-in Multiple-out (
)
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Multiple antennas on sender and receivers
�
Increased spectral efficiency
�
Hybrid Automatic Repeat Request (HARQ)
�
Adjusts automatically to channel conditions
�
Adds redundancy only when needed
�
Receiver saves failed transmission attempts to help future
decoding
decoding
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