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ExpertAverage RatingsExpertise

Kashif Amjad

Australia
Available
  • Knowledgeability 9.38
  • Clarity of Response 9.08
  • Timeliness 10.0
  • Politeness 9.92
  • Total Questions 223
 I can talk about all GSM wireless systems and in particular I am one of the worlds leading experts on Mobile Virtual Network Operators (MVNO) and can talk about all facets including, pricing, tariffing, billing, customer serivce, products, handsets, branding, marketing, advertising and network contract negotiation.

Jerry Hinshaw

U.S.
Available
  • Knowledgeability 9.83
  • Clarity of Response 9.79
  • Timeliness 9.83
  • Politeness 9.98
  • Total Questions 261
 RF and microwave engineering, hardware and systems applications. Avionics, satellite, and terrestrial communications. Space communications and navigation, geo-location services via satellite and ground-based wireless systems. Systems integration of RF and wireless services.

Gerry Christensen

Available
  • Knowledgeability 9.78
  • Clarity of Response 9.78
  • Timeliness 9.91
  • Politeness 9.93
  • Total Questions 588
 I can answer questions about mobile communications networking, network signaling, intelligent networks and infrastructure, and applications such mobile location services.

Mark C J Posen

U.K.
On Vacation
returns 12/05/2009
  • Knowledgeability 9.50
  • Clarity of Response 9.67
  • Timeliness 9.39
  • Politeness 9.94
  • Total Questions 81
 I am happy to answer questions of a technical and regulatory nature in the area of radiocommunications and satellite communications. I am best able to answer questions about systems and technology and less able to respond to questions about specific hardware and equipment setup and installation, but I'm happy to try and address any question put my way. My main areas of expertise are link analysis (link budgets, performance, Eb/No, capacity), interference analysis (C/I, protection ratios, interference avoidance), spectrum management (frequency coordination, inter-system sharing), Radio Regulation (ITU, ITU-R) and radio and satellite technologies and trends.

Recent Answers

2009-10-31 Network:

Hi James, Thanks for the question and sorry to take a while to reply. It's not really my field, and you don't give precise detail about what you want to do, but it's an interesting problem and I

2009-10-25 a question:

Hello, Many thanks for this question. Unfortunately, because this is a health and safety issue I'm not going to be able to comment personally on the safety or otherwise of these technologies because

2009-10-15 wireless connection:

Hello Chris, I don’t think that the IP settings can affect the router’s signal strength. If all of your PCs have a similar symptom – poor connections to the wireless router – then I suggest you look

2009-10-02 BDA:

Hello Dee, Yes, a cell phone bi-directional amplifier (BDA) with a remote antenna can work to give you better cell phone coverage. They work by placing a directional antenna in a good location to "see"

2009-09-24 Please help needed:

Hello Hazem, Most low-cost USB cameras get their power from the USB port. Are your transmitter circuits powering the camera? A basic USB camera is set up with its USB port depending on the host

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