The simulation loop simultaneously evaluates the BER performance of the three re

Question

The simulation loop simultaneously evaluates the BER performance of the three receiver schemes for each Eb/No value using the same data and channel realization. A short range of Eb/No values are used for simulation purposes.

Which receiver shows the best performance?

Rank the receivers based on performance.

How do these results compare with a system that has only one antenna using QPSK modulation?

Spatial Multiplexing File Edit View Insert Tools Desktop Window Help | 83 | | | Spatial Multiplexing File Edit View Insert Tools Desktop Window Help 2x2 Uncoded QPSK System 2x2 Uncoded QPSK System 10 ZF-SIC O MMSE-SIC O ML 10 ZF-SIC O MMSE-SIC ML 10 10 L 0-3 i 103 0 10 .2 10 10 30 15 20 25 10 10 Eb/No (dB) 2 Eb/No (dB)

Explanation / Answer

A) Maximum liklihood performs better than the rest of the two as can be seen from the graph. As seen in both the graph, for the same Eb/N0 i.e. signal to noise ratio, the BER i.e. bit error rate of ML is least. ZF-SIC performs worst in these three.

B) Based on the above reason, it can be said that, Maximum-Likelihood (ML) > Minimum-Mean-Square-Error (MMSE) > Zero-Forcing (ZF)

c) The system that has only one antenna uses less energy but its BER is more than the three mentioned above. The whole purpose of using antenna array is to increase performance in terms of bit error rate by reducing it. But it includes extra circuitory and needs more energy to power the circuitory and for signal transmission.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.