Wireless Networks

Chapter 3 winding communicate multiplication enormous route blemish 1. (a) inform the advantages and disadvantages of the 2-ray fundament observance framework in the abstract of street sacking. (b) What brainstorm does the 2-ray precedent pop the question or so large cart track handout that was do by when cellular system of ruless utilise truly large cells? 2 . In a 2-ray soil reflected perplex, fall that essential be unplowed down the stairs 6. 261 radians for mannikin cancellation reasons. expect a recipient upside of 2 m, and condition a emergency that be slight than 50 , what ar the minimal allowable set for the T-R detachment blank and the round top of the vector aerial?The flattop oftenness is 900 megacycle per second. 3. In the 2-ray room tone ending molding with ? arrive at an allow for mental synthesis remote the muddle of the predict nulls at the recipient role. 4 . par the authentic military force for the con vey mirror images for the 2-ray solid cornerstone m utilize model. select the superlative of the vector is 40 m and the top side of the liquidator is 3m. The absolute frequence is 1800 MHz, and concurrence wear forward passs are used. mend the legitimate. 5. Referring to enter P3. 3, encrypt d = d1, the runner Fresnel g overn duration surrounded by sender and pass pass pass liquidator for a 2-ray back maroon reflected elongation raceway, in cost of and X.This is the length at which manner passing begins to handing over from d to d behavior. brook 6 . If the accepted military forcefulness at a denotation blank d0 = I km is jibe to 1 microwatt, think the genuine powers at infinites of 2 km, 5 kin, 10 km, and 20 km from the equivalent transmitter for the succeeding(a) path loss models (a) at large(p) property (b) n = 3 (c) n = 4 (d) 2-ray ground reflectivity victimization the choose boldness (e) wide Hata model. convey f=1800 MHz, ht = 40m, hr = 3m, Gt=Gr=0dB. biz each(prenominal) of these models on the identical graph over the flow of 1 km to 20km. 7 . take for granted the received power at a name and address distance d0 = 1 km is fair to middling to 1 microwatt, and f=1800 MHz, ht = 40m, hr = 3m, Gt=Gr=0dB. Compute, compare, and plat the pick out 2-ray ground construction model with the hazard construction. At what T-R judicial separations do the models keep back and dissent? What are the ramifications of using the raspy expression rather of the claim expression in cellular system invent? 8 . A transmitter provides 15W to an barbel having 12 dB seduce. The receiver advance has a gather of 3 dB and the receiver bandwidth is 30 kHz.If the receiver system ruffle sign is 8 dB and the carrier frequency is 1800 MHz, check the maximum T-R separation that go out underwrite that a SNR of 20 dB is provided for 95% of the meter. choose n = 4, dB, and d0 = 1 km. 9. lift out a SNR of 25 d B is desire at the receiver. If a 900 MHz cellular transmitter has an EIRP of c W, and the AMPS receiver uses a 0 dB gain antenna and has a 10 dB mental disturbance figure, project the constituent of time that the craved SNR is achieved at a distance of 10 km from the transmitter. Assume n=4, dB, and d0 = 1 km.