Keysight E6640A, Руководство пользователя и программиста по приложениям измерений

Страница: 1821 / 2870

12 Code Domain Measurement
Source
LTE TDD Channel Number Ranges
The carrier frequency in the uplink and downlink is designated by the E-UTRA Absolute Radio Frequency
Channel Number (EARFCN) in the range 0 – 65535. The relation between EARFCN and the carrier
frequency in MHz for the downlink is given by the following equation, where FDL_low and NOffs-DL are
given in table 5.4.4–1 and NDL is the downlink EARFCN.
FDL = F 0.1(NDL – NOffs-DL)
The relation between EARFCN and the carrier frequency in MHz for the uplink is given by the following
equation where FUL_low and NOffs-UL are given in table 5.4.4–1 and NUL is the uplink EARFCN.
FUL = F 0.1(NUL – NOffs-UL)
Band Downlink Uplink
F DL_low
( MHz )
N Offs-DL Range of
N
DL
F UL_low ( MHz ) N Offs-UL Range of
N
UL
33 1900 36000 36000 –36199 1900 36000 36000 – 36199
34 2010 36200 36200 –36349 2010 36200 36200 – 36349
35 1850 36350 36350 –36949 1850 36350 36350 – 36949
36 1930 36950 36950 –37549 1930 36950 36950 – 37549
37 1910 37550 37550 –37749 1910 37550 37550 – 37749
38 2570 37750 37750 –38249 2570 37750 37750 – 38249
39 1880 38250 38250 –38649 1880 38250 38250 – 38649
40 2300 38650 38650 –39649 2300 38650 38650 – 39649
41 2496 39650 39650 – 41589 2496 39650 39650 – 41589
42 3400 41590 41590 – 43589 3400 41590 41590 – 43589
43 3600 43590 43590 – 45589 3600 43590 43590 – 45589
Note: The channel numbers that designate carrier frequencies so close to the operating band edges that the carrier extends
beyond the operating band edge shall not be used. This implies that the first 7, 15, 25, 50, 75 and 100 channel numbers at the
lower operating band edge and the last 6, 14, 24, 49, 74 and 99 channel numbers at the upper operating band edge shall not
be used for channel bandwidths of 1.4, 3, 5, 10, 15 and 20 MHz respectively.
TDSCDMA Channel Number Ranges
1.28 Mcps TDD Option
No TX-RX frequency separation is required as Time Division Duplex (TDD) is employed. Each subframe
consists of 7 main timeslots where all main timeslots (at least the first one) before the single switching
point are allocated DL and all main timeslots (at least the last one) after the single switching point are
allocated UL.
The nominal channel spacing is 1.6 MHz, but this can be adjusted to optimise performance in a particular
deployment scenario.
The carrier frequency is designated by the UTRA absolute radio frequency channel number (UARFCN). The
value of the UARFCN in the IMT2000 band is defined in the general case as follows:
W-CDMA & HSPA Measurement Applications Reference 1821