انجام پروژه درس تئوری پیشرفته مخابرات

شرح پروژه

سلام

پروژه هم مربوط به درس تئوری پیشرفته میشه

استادیه چندتاپروژه داده گفته هرکدوم که میخاهیدیعنی یکیش انجام بدید

یکی از مسائل  زیر را با استفاده از شبیه سازی کامپیوتر حل کنید:

1-Consider the 4-QAM signal set described by s( t ) = Re{a g(t) exp(j2π9×10 7 t)}, where

the complex symbol is drawn from the 4-QAM alphabet a∈{–1 – j, –1 + j, 1 – j, 1 + j}, and where

the pulse shape is g(t)=1 for t ∈[–0.5, 0.5] and zero elsewhere. Suppose a receiver observes a

delayed and noiseless version of s(t), r( t ) = s(t – τ), for some delay τ ≥ 0. The receiver is unaware

of the delay and it minimizes distance under the assumption that τ = 0. Find the smallest delay τ

(expressed in seconds) that causes the decision to be incorrect.

2-Consider an 8 ary QAM system with the following signal coordinates relative to an

orthonormal basis {ψ1, ψ2}: (±A, 0), (±3A, 0), (±A, ±2A). The signals are sent with equal

probability, and are corrupted by AWGN with two-sided power spectral density No/2.

(a) Sketch the maximum likelihood decision regions on the following signal coordinate diagram.

(b) Express the average symbol energy and the average energy per bit in terms of A2

.

(c) Find a union bound on the probability of symbol error given that the signal with coordinates

(A, 2A) is transmitted. Use the minimum number of terms required.

(d) Express the maximum symbol error probability exactly in terms of A, No, and the Q function,

for the maximum likelihood receiver. (The maximum symbol error probability is the maximum,

over all eight possible transmitted symbols, of the symbol error probability.)

(e) Compare the power efficiency of this system with an 8-level PAM system

ایناس گفته یک کدومش حل کنید

مهارت ها و تخصص های مورد نیاز

درباره کارفرما

مطهره فیاض

عضویت هفت سال پیش

13712 پروژه ثبت شده ،

122 پروژه در حال انجام ،

1 پروژه آماده دریافت پیشنهاد ،

نرخ پذیرش پیشنهاد 36%