216
Mundarija
Kirish…………..………………..………………..….……………......3
1- bob. Simsiz aloqa tizimlari asoslari..................................................6
1.1. Radioaloqani tashkil etish tamoyillari........................................... 6
1.2. Kanallar va to‘lqinlarning tarqalishi............................................12
1.3. Simsiz aloqada antennalar........................................................... 19
1.4 Ko‘p tomonlama ulanish texnologiyalari..................................... 28
1.5 Signalni modulyatsiyalash turlari..................................................45
2- bob. Mobil radiotelefon aloqasi......................................................72
2.1 Sotali aloqa tizimlarining rivojlanishi.......................................... 72
2.2. Mobil radioaloqa tizimlarida tasniflash, qurish tamoyillari va
chastotaviy rejalashtirish.....................................................................78
2.3. Harakatdagi radioaloqa sotali tizimlari standartlari.
Ikkinchi avlod standartlari.................................................................. 85
2.4. Uchinchi avlod sotali tizimlari.................................................... 89
2.5. 4G sotali aloqa tizimlari konsepsiyasi......................................... 96
2.6. OFDM va OFDMA texnologiyalari.......................................... 100
2.7. LTE standarti............................................................................ 111
2.8 Mobil aloqaning istiqbolli texnologiyalari ................................120
3- bob. Radioreleli va sun’iy yo‘ldoshli aloqa. Sun’iy yo‘ldoshli
navigatsiya........................................................................................127
3.1. Radioreleli aloqa. Raqamli RRLlarning tasniflanishi va
qo‘llanilishi sohalari......................................................................... 127
3.2. Sun’iy yo‘ldoshli aloqani tashkil etish va ESY orbitalari…… .132
3.3. Sun’iy yo‘ldoshli navigatsiya.................................................... 142
4- bob Simsiz keng polosali ulanish texnologiyalari........................146
4.1 Wi-Fi (IEEE 802.11) standarti....................................................146
4.2. WiMAX (IEEE 802.16) standarti..............................................152
5- bob. Boshqa simsiz aloqa turlari...................................................159
5.1. Peyjing va tranking aloqa...........................................................159
5.2. Raqamli televidenie va radioeshittirish......................................164
5.3.
Bluetooth, HomeRF, ZigBee, NFC va Wireless USB aloqa
texnologiyalari...................................................................................179
5.4 Radiochastotaviy identifikatsiyalash.......................................... 193
5.5. Kognitiv radio............................................................................196
5.6 Ochiq optik uzatish tizimlari.......................................................200
Glossariy …..………………………………....................................207
Adabiyotlar …………………………….…..…..……….....…….....213
