Telekommunikatsiya texnologiya kafedrasi individual loyixa

4-QISM VARIANTLARI

№	fuz	fq.q	(S/N)kir	γnom	αАFТ	F0 imp	σE1	P0 nk
1	800	900	1	0.10	0.1	1200	8	0.8	30
2	805	905	2	0.12	0.2	1210	8.1	0.81	32
3	810	910	3	0.14	0.3	1220	8.2	0.82	34
4	815	915	4	0.16	0.4	1230	8.3	0.83	36
5	820	920	5	0.18	0.5	1240	8.4	0.84	38
6	825	925	6	0.20	0.6	1250	8.5	0.85	40
7	830	930	7	0.22	0.7	1260	8.6	0.86	42
8	835	935	8	0.24	0.8	1270	8.7	0.87	44
9	840	940	9	0.26	0.9	1280	8.8	0.88	46
10	845	945	10	0.28	1	1290	8.9	0.89	48
11	850	950	11	0.30	1.1	1300	9	0.9	50
12	855	955	12	0.32	1.2	1310	9.1	0.91	52
13	860	960	13	0.34	1.3	1320	9.2	0.92	54
14	865	965	14	0.36	1.4	1330	9.3	0.93	56
15	870	970	15	0.38	1.5	1340	9.4	0.94	58
16	875	975	16	0.40	1.6	1350	9.5	0.95	60
17	880	980	17	0.42	1.7	1360	9.6	0.96	62
18	885	985	18	0.44	1.8	1370	9.7	0.97	64
19	890	990	19	0.46	1.9	1380	9.8	0.98	66
20	895	995	20	0.48	2	1390	9.9	0.99	68

5. GSM UYALI QAMROV ZONASIDAGI AVTOTRANSPORT VOSITALARINING OPTIMAL SHOVQIN DARAJASINI HISOBLANG
Dastlabki ma'lumotlar
АS o'rtacha uzatish chastotasi, f_uzat, MGs 890
O'rtacha qabul qilish chastotasi, f_q,q, MGs 935
AS qabul qiluvchining kirishidagi signal-shovqin nisbati, (S/N)_kirish, db 8
AS qabul qiluvchining sezgirligi, γ_NОМ, мкВ 0,35
АS antenna-fider traktida signalning so’nishi, α_АFТ, db 1
Xalaqitlar takrorlanish impulsining o'rtacha chastotasi,
F_{0 IMPULS,} imp/sek 1310
1-guruh xalaqitining amlituda impulsining o’rtacha kvadratik og’ishi, , db 9,5
Impulslar guruhining 0dB darajasidan oshib ketish ehtimoli,
, nisbiy. kattalik. 0,97
Amplituda impuls xalaqitlarini o'rtacha qiymati, , db 48
Hisoblash
1. Birinchi shovqin manbai tomonidan yaratilgan shovqin impulslari amplitudasining o'rtacha qiymatini olaylik _=48dB. Keyin shovqinning amplituda impulsi ikkinchi manbada quyidagicha

bu yerda f_q.q– o'rtacha qabul qilgich chastotasi, MGs.
2. Har bir manba guruhi tomonidan yaratilgan xalaqit impulslarining takrorlanish chastotalari

qayerda f_q.q– – o'rtacha qabul qilgich chastotasi, MGs.
3. Nol darajasida o'rtacha shovqin impulslarining takrorlanish o’rtacha chastotasi

bu yerda F_{0 imp(12)}– shovqin impulslarining o'rtacha takrorlanish chastotasi, imp / sek.
4. Qabul qilgich va shovqin manbasi orasidagi masofa jarayonning so’nish koefsentiga bog’lanish ko’rsatgichi.
,
bu yerda – qabul qilgichda signalning to'lqin uzunligi, m;
r₀=3 – harakatlanuvchi shovqin manbai va o'lchash majmuasi orasidagi masofa, m;
r₁=7 – shovqin manbai va AS qabul qiluvchi antenna orasidagi masofa, m.
5. AS qabul qilgichining polosa kengligi
,P_q.q=2(Δf+F_MAX)=2(5+3,4)=16,8,kGs,
bu yerda Δf=5 – chastotali og'ishi, kGs;
F_max=3,4 – maksimal tovush modulyatsiya chastotasi, kGs.
6. Birinchi va ikkinchi guruh manbalarining xalaqit maydoni kuchayishining o'rtacha samarali qiymati

bu yerda – shovqin impulsi amplitudalarining o’rtacha kvadratik og'ishi,
db, ;
P_q.q– AS qabul qilgichining o’tkazish polosasi, Gs;
P_o’lchov=120_{ }10³;– xalaqit muhitining parametrlari o'lchangan polosasi, Gs;
–impulslar guruhining 0,97 db,darajasidan oshish ehtimoli nisbiy. kattalik.;
S – so’nish jarayonning shovqin manbai va qabul qilgichi orasidagi masofaga bog'liqligini ko'rsatkichi, db.




7. AS ning tashqi shovqin darajasi

,N_tashqi=_{ EF}, mkV/m

bu yerda – xalaqitni kuchlanish matdonining o’rtacha samarali qiymati, mkV/m.

.
8. Xususiy xalaqitning shovqin darajasi
,
bu yerda γ_НОМ – qabul qilgichning sezgirligi, mkV;
– AS antenna fider trakti, nisbiy. kattalik.;
– AS qabul qilgichining kirishidagi signal shovqin nisbati, nisbiy. kattaligi.;
– AS antennaning xarakat uzunligi, m;
F_uzatish – o'rtacha uzatish chastotasi, Gs.

9. Xalaqitlar darasining yig’indisi

.


5-QISM VARIANTLARI

№	fuz	fq.q	(S/N)kir	γnom	αАFТ	F0 imp	σE1	P0 nk
1	800	900	1	0.10	0.1	1200	8	0.8	30
2	805	905	2	0.12	0.2	1210	8.1	0.81	32
3	810	910	3	0.14	0.3	1220	8.2	0.82	34
4	815	915	4	0.16	0.4	1230	8.3	0.83	36
5	820	920	5	0.18	0.5	1240	8.4	0.84	38
6	825	925	6	0.20	0.6	1250	8.5	0.85	40
7	830	930	7	0.22	0.7	1260	8.6	0.86	42
8	835	935	8	0.24	0.8	1270	8.7	0.87	44
9	840	940	9	0.26	0.9	1280	8.8	0.88	46
10	845	945	10	0.28	1	1290	8.9	0.89	48
11	850	950	11	0.30	1.1	1300	9	0.9	50
12	855	955	12	0.32	1.2	1310	9.1	0.91	52
13	860	960	13	0.34	1.3	1320	9.2	0.92	54
14	865	965	14	0.36	1.4	1330	9.3	0.93	56
15	870	970	15	0.38	1.5	1340	9.4	0.94	58
16	875	975	16	0.40	1.6	1350	9.5	0.95	60
17	880	980	17	0.42	1.7	1360	9.6	0.96	62
18	885	985	18	0.44	1.8	1370	9.7	0.97	64
19	890	990	19	0.46	1.9	1380	9.8	0.98	66
20	895	995	20	0.48	2	1390	9.9	0.99	68

6. 7.8-jadvallarga muvofiq shaharda AS (Abonent stansiya) - BS (Baza stansiya) yo'nalishi bo'yicha GSM uyali aloqa tarmog'ining aloqa diapazoni hisoblang. Shaharni tanlash o’zbekistondagi shaharlar ro'yxatidan familiyaning birinchi harfiga ko'ra amalga oshiriladi

Sizlarga misol tariqasida dastlabki ma'lumotlar sifatida 8.9-jadvalda keltirilgan. Shundan foydalanib xar bir talaba 8A, 9A-jadvallardan foydalanib o’z variantlarini bajaradi. Dastlabki ma'lumotlar

7-jadval

Parametrlar/ variant	3
	BS	НС
O'rtacha uzatish chastotasi, MGts	945	900
O'rtacha qabul qilish chastotasi, MGts	900	945
Yetkazish va qabul qilish kanallarining dupleks oralig'i, MGts qabul qilish.	45	45
Nutqni aylantirish tezligi (kbit/s)	13	13
Xizmat ko'rsatilayotgan obunachilar soni. terminallar	124x8	124x8
Maksimal modulyatsiya chastotasi, kHz	3.4	3.4
Maksimal og'ish, kHz	5	5
Antenna-fider traktining to'lqin qarshiligi, Om	50	50
12 dB, mkV chiqishida signal-shovqin nisbati bilan qabul qiluvchining sezgirligi	0,22	0,22
Har bir kanal uchun transmitterning chiqish quvvati, Vt ^1	dastur	1.0
Antennaning balandligi, m	140	1.5

Aloqa diapazonini hisoblash uchun dastlabki ma'lumotlar

Jadval 8.

Parametrlar / variant	0
	BS	NS
Antennaning kuchayishi, dB	4.6	0
Gorizontal tekislik antennasining radiatsiya sxemasining notekisligi, dB	1.18	0
BS antenna tizimining yo'nalish koeffitsienti, dB	3.4
Antennani ajratuvchi quvvatni taqsimlash koeffitsienti, dB	6.25
Kabelning zaiflashishi (Затухание), dB	3.45
Ikki tomonlama filtrning zaiflashuvi, dB	1.3
Ajratish moslamasida zaiflashuv, dB	3.7
Ulanish moslamasining kuchayishi, dB	2.15
Antenna-fider traktida nosimmetrikliklar tufayli zaiflashuv, dB	1.22
Antenna-fider traktida zaiflashuv, dB		1.05
Tuproq balandligining o'rtacha tebranishi, m	15	15