HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comment
cnorton
User Rank
Iron
Re: Part III: ZigBee & Wireless Sensor Networks
cnorton   4/11/2012 2:53:42 PM
NO RATINGS
Fanny,
You have made the point several times that multi-path is required for MIMO to work.  While I agree that overcoming the problems that multi-path causes is one of the strengths of MIMO, I don't understand multi-path being a requirement.  Two transmitters at one place, connected to two separate receivers at another, each pair using a separate multi-path free RF path will provide twice the throughput of one alone.  By extension, any symmetrical MIMO (2x2, 3x3, 4x4).  For a single receiver receiving packets from two transmitters (non-symmetric MIMO, 3x2, 3x4, etc., and cross channel paths) the packets have to arrive at slightly different times, either caused by different RF path lengths (multi-path) or by delaying one of the transmitters.  Perhaps the distinction should be made between multi-path and multiple RF paths.



Partner Zone
Latest Analysis
Perfection is a laudable, but ultimately unattainable, goal, even for the world's most successful consumer electronics company. You know the hits; here are Apple's all-time greatest misses.
Siemens' new version of Imagine Lab was designed to help the automotive and aerospace industries meet environmental mandates.
Belden and Secomea have developed a remote access system that gives users a plug-and-play connection to plant assets.
Here are some of the top-paying jobs available to engineers as they grow in their careers.
As manufacturers add new technologies to their products, designing for compliance becomes more difficult. Prepare for the certification testing process. Otherwise, you increase the risk of discovering a safety issue after a product leaves the assembly line. That will cause significant time-to-market delays, be much costlier to fix, and damage your brand in the eyes of customers. 
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service