Mir Lodro

12 Questions 27 Answers 0 Followers

Questions related from Mir Lodro

How do I detect primary user (PU) in a Full-Duplex Cognitive Radio Network?

Which shall be more challenging to design MAC protocols or the sensing-strategies? What shall be the fundamental trade-off if we want to maximise the SU throughput and minimise SU interference to...

20 July 2015 1,480 3 View

What should be the role of Cognitive Radio in 5G mmWave cellular communication?

As it's a well-known fact that highly focused beams or the "pencil beams" shall be central to 5G mmWave cellular communication. MmWave don't only promise unchannelised high-bandwidth at the higher...

17 February 2015 8,813 1 View

Is there any mechanism for the co-existence of IEEE 802.22 and IEEE 802.11af?

The two standards seem to compete for the TV White Space (TVWS) because they are different at nearly whole protocol stack. For example the transmission power for IEEE 802.22 is 4W (36dBm) that is...

29 October 2014 8,421 4 View

What are the forefront technical challenges in cellular network Device-to-Device (D2D) communication?

Will the existing fading models, modulation formats and coding techniques applicable for D2D communication? To what extent will it address the problems like energy efficiency and network spectral...

04 September 2014 7,707 3 View

In which of the following bands i.e., Q-band(40.5-43.5GHz) and V-band(57-66GHz), will the design of millimeter antennas be advantageous?

The advantages can be considered in perspective of propagation, bandwidth, and gains.

19 June 2014 8,761 9 View

What is the cost of increasing the number of samples in quantization process?

Why do we prefer non-uniform quantizers over uniform ones?

30 April 2014 4,107 7 View

Why do we use basis functions in realization of correlator receiver?

Are replicas of the transmitted signals, used as reference signals, insufficient and inadequate for demodulation?

22 April 2014 2,107 1 View

What are the factors that cause intersymbol interference (ISI)?

What are the methods to alleviate this error performance degradation factor in wireless communication? To what extent would it be correct to say that pulse shaping at the transmitter and receiver...

10 April 2014 3,163 9 View

What are the latest advancements in Device-to-device communication?

Which one is more promising, network-assisted D2D or without network D2D communication? It's generally said that in D2D communication the two devices communicate directly using highly directional...

02 April 2014 4,775 4 View

Why is it necessary that the adjacent antennas should be lambda/2 apart in MIMO systems?

How is it possible that the mutual coupling will not take place even though the two antennas are distanced by lambda/2? Is there any role of grating lobes created in antenna array as a possible...

01 April 2014 549 18 View

What are the research advances in IEEE 802.22 standard for Cognitive Radios?

It is believed that, recently, cognitive radios have been investigated for TV white spaces in VHF and UHF band. If this is true then what are the latest developments in the regulatory issues and...

30 March 2014 333 10 View

What are the limiting factors for Under-Water Acoustic Communication(UWAC)?

Can we use EM waves >100kHz for underwater communications? Is there any possibility of OFDM-based system for underwater communication?

30 March 2014 3,096 1 View