根据信道号计算2G，3G，4G上行和下行频率

python脚本如下：

# http://www.rfwireless-world.com/Terminology/LTE-EARFCN-to-frequency-conversion.html
print("uplink frequency for LTE band 1:")
b1_u = [18550, 18300, 18050]
for channel in b1_u :
    print (channel, ' -> ', 1920 + 0.1 * (channel - 18000), 'MHz')

print ("downlink frequency for LTE band 1:")
b1_d = [550, 300, 50]
for channel in b1_d :
    print (channel, ' -> ', 2110 + 0.1 * (channel - 0), 'MHz')

print("uplink frequency for LTE band 19:")
b19_u = [24100, 24075, 24050]
for channel in b19_u :
    print (channel, ' -> ', 830 + 0.1 * (channel - 24000), 'MHz')

print ("downlink frequency for LTE band 19:")
b19_d = [6100, 6075, 6050]
for channel in b19_d :
    print (channel, ' -> ', 875 + 0.1 * (channel - 6000), 'MHz')

print("-----------------------------------------------------------------")
# https://en.wikipedia.org/wiki/UMTS_frequency_bands
print("uplink frequency for WCDMA band 1:")
wb1_u = [9888, 9750, 9612]
for channel in wb1_u :
    print (channel, ' -> ', channel / 5, 'MHz')

print ("downlink frequency for WCDMA band 1:")
wb1_d = [10838, 10700, 10562]
for channel in wb1_d :
    print (channel, ' -> ', channel / 5, 'MHz')

print("uplink frequency for WCDMA band 5:")
wb5_u = [4233, 4175, 4132]
for channel in wb5_u :
    print (channel, ' -> ', channel / 5, 'MHz')

print ("downlink frequency for WCDMA band 5:")
wb5_d = [4458, 4400, 4357]
for channel in wb5_d :
    print (channel, ' -> ', channel / 5, 'MHz')

print("-----------------------------------------------------------------")
# https://en.wikipedia.org/wiki/Absolute_radio-frequency_channel_number
gsm850_u = [128, 190, 205, 220, 235, 251]
for channel in gsm850_u :
    print("uplink frequency for GSM850:")
    freqU = 824.2 + 0.2 * (channel - 128)
    print (channel, ' -> ', freqU, 'MHz')
    print ("downlink frequency for GSM850:")
    print (channel, ' -> ', freqU+45, 'MHz')

egsm_u = [975, 38, 65, 124]
for channel in egsm_u:
    print("uplink frequency for EGSM:")
    freqU = 0
    if channel > 124:
        freqU = 890.0 + 0.2*(channel-1024)
    else:
        freqU = 890.0 + 0.2*channel
    print (channel, ' -> ', freqU, 'MHz')
    print ("downlink frequency for EGSM:")
    print (channel, ' -> ', freqU+45, 'MHz')    

dcs_u = [512, 699, 885]
for channel in dcs_u:
    print("uplink frequency for DCS:")
    freqU = 1710.2 + 0.2*(channel-512)
    print (channel, ' -> ', freqU, 'MHz')
    print ("downlink frequency for DCS:")
    print (channel, ' -> ', freqU+95, 'MHz')

pcs_u = [512, 661, 810]
for channel in pcs_u:
    print("uplink frequency for PCS:")
    freqU = 1850.2 + 0.2*(channel-512)
    print (channel, ' -> ', freqU, 'MHz')
    print ("downlink frequency for PCS:")
    print (channel, ' -> ', freqU+80, 'MHz')

运行结果 txt：

—————————– LTE B1 ————————————
uplink frequency for LTE band 1:
18550 -> 1975.0 MHz
18300 -> 1950.0 MHz
18050 -> 1925.0 MHz
downlink frequency for LTE band 1:
550 -> 2165.0 MHz
300 -> 2140.0 MHz
50 -> 2115.0 MHz
—————————– LTE B3 ————————————
uplink frequency for LTE band 3:
19250 -> 1715.0 MHz
19575 -> 1747.5 MHz
19900 -> 1780.0 MHz
downlink frequency for LTE band 3:
1250 -> 1810.0 MHz
1575 -> 1842.5 MHz
1900 -> 1875.0 MHz
—————————– LTE B19 ————————————
uplink frequency for LTE band 19:
24100 -> 840.0 MHz
24075 -> 837.5 MHz
24050 -> 835.0 MHz
downlink frequency for LTE band 19:
6100 -> 885.0 MHz
6075 -> 882.5 MHz
6050 -> 880.0 MHz
—————————– LTE B28 ————————————
uplink frequency for LTE band 28B:
27436 -> 725.6 MHz
27510 -> 733.0 MHz
27610 -> 743.0 MHz
downlink frequency for LTE band 28B:
9436 -> 780.6 MHz
9510 -> 788.0 MHz
9610 -> 798.0 MHz
—————————– WCDMA B1 ————————————
uplink frequency for WCDMA band 1:
9888 -> 1977.6 MHz
9750 -> 1950.0 MHz
9612 -> 1922.4 MHz
downlink frequency for WCDMA band 1:
10838 -> 2167.6 MHz
10700 -> 2140.0 MHz
10562 -> 2112.4 MHz
—————————– WCDMA B5 ————————————
uplink frequency for WCDMA band 5:
4233 -> 846.6 MHz
4175 -> 835.0 MHz
4132 -> 826.4 MHz
downlink frequency for WCDMA band 5:
4458 -> 891.6 MHz
4400 -> 880.0 MHz
4357 -> 871.4 MHz
—————————– WCDMA B6 ————————————
uplink frequency for WCDMA band 6:
4162 -> 832.4 MHz
4175 -> 835.0 MHz
4188 -> 837.6 MHz
downlink frequency for WCDMA band 6:
4387 -> 877.4 MHz
4400 -> 880.0 MHz
4413 -> 882.6 MHz
—————————– WCDMA B19 ————————————
uplink frequency for WCDMA band 19:
312 -> 797.4 MHz
337 -> 802.4 MHz
363 -> 807.6 MHz
downlink frequency for WCDMA band 19:
712 -> 877.4 MHz
737 -> 882.4 MHz
763 -> 887.6 MHz
From Wiki: ul 830 ~ 845, dl 875 ~ 890
—————————————————————–
uplink frequency for GSM850:
128 -> 824.2 MHz
downlink frequency for GSM850:
128 -> 869.2 MHz
uplink frequency for GSM850:
190 -> 836.6 MHz
downlink frequency for GSM850:
190 -> 881.6 MHz
uplink frequency for GSM850:
251 -> 848.8000000000001 MHz
downlink frequency for GSM850:
251 -> 893.8000000000001 MHz
uplink frequency for EGSM:
975 -> 880.2 MHz
downlink frequency for EGSM:
975 -> 925.2 MHz
uplink frequency for EGSM:
38 -> 897.6 MHz
downlink frequency for EGSM:
38 -> 942.6 MHz
uplink frequency for EGSM:
65 -> 903.0 MHz
downlink frequency for EGSM:
65 -> 948.0 MHz
uplink frequency for EGSM:
124 -> 914.8 MHz
downlink frequency for EGSM:
124 -> 959.8 MHz
uplink frequency for DCS:
512 -> 1710.2 MHz
downlink frequency for DCS:
512 -> 1805.2 MHz
uplink frequency for DCS:
699 -> 1747.6000000000001 MHz
downlink frequency for DCS:
699 -> 1842.6000000000001 MHz
uplink frequency for DCS:
885 -> 1784.8 MHz
downlink frequency for DCS:
885 -> 1879.8 MHz
uplink frequency for PCS:
512 -> 1850.2 MHz
downlink frequency for PCS:
512 -> 1930.2 MHz
uplink frequency for PCS:
661 -> 1880.0 MHz
downlink frequency for PCS:
661 -> 1960.0 MHz
uplink frequency for PCS:
810 -> 1909.8 MHz
downlink frequency for PCS:
810 -> 1989.8 MHz