Wideband communication and Narrowband communication

Wideband communication

Wideband communication uses – as the name states – a wider portion of the spectrum. This has some advantages and disadvantages:

  • Wideband communication allows for a higher bandwidth and therefore for a faster communication
  • Wideband communication allows for spreading the signal to encrypt it (See: Direct Sequence Spread Spectrum and its derivates)
  • wideband communication allows for notching out narrow noise sources in the spectrum (See OFDM)
  • Wideband communication puts high demands on the linearity of filters (also the respective filter bandwidths are higher)
  • It’s harder to send and detect wideband signals (You need a high Signal to Noise ratio) as the energy of the signal is distributed across the width of the spectrum which makes the signal weaker the wider it gets (transmitting on a given power level)
  • Wideband communication is almost exclusively done in higher frequencies (I’d say 433MHz+) as it’s easier to design integrated circuits which have wider filters
  • Common modulation techniques are OFDM, GMSK, N-PSK and QAM-N in combination with frequency hopping
  • Examples of wideband communication are wireless networks: Wifi, LTE, HSPA

Narrowband communication

Narrowband communication uses a narrow bandwidth.

  • Narrowband signals are used in a slower form of communication where mainly voice or slow datastreams have to be transmitted
  • Narrowband signals usually have a far greater range of reception as narrower filters can be used and therefore cancel out unwanted wideband noise. The transmitted energy also concentrates on a smaller portion of the spectrum.
  • Common uses are FM radio, AM radio, satellite downlinks, morse code (CW), GPS signals and NOAA weather transmissions.
  • Common modulation techniques are AM, FM, SSB, BPSK and CW

Often IC manufacturers do focus on narrowband communication because often you need to flip a switch and propagate the change in signal through the air which does not need a high bandwidth. If you however try to send a x264 packed HD picture with 24MBit over the air you most certainly need a high bandwidth to transmit it in realtime. But according to the frequency usage plans you need to use a higher frequency band to be allowed to use a certain bandwidth (or power level). This is why wideband communication is almost exclusive to hardware used for 1 GHz+ operation.

65 comments

  1. I am not sure where you’re getting your info, but great topic. I needs to spend some time learning much more or understanding more. Thanks for great information I was looking for this info for my mission.

  2. Thanks for your publication on the traveling industry. I will also like to include that if you’re a senior taking into account traveling, it can be absolutely important to buy travel cover for elderly people. When traveling, retirees are at greatest risk of having a professional medical emergency. Having the right insurance policies package to your age group can safeguard your health and provide you with peace of mind.

  3. Wow that was unusual. I just wrote an incredibly long comment but after I clicked submit my comment didn’t show up. Grrrr… well I’m not writing all that over again. Anyway, just wanted to say superb blog!

  4. A wireless HDMI transmitter not only eliminates such fears, it also provides an extended operational range with enhanced audio video qualities and freedom of moving your TV sets or projector screen without the tension of moving TV boxes or DVD players along with it.

  5. I’m now not certain the place you’re getting your info, however great topic. I must spend some time finding out more or figuring out more. Thanks for magnificent information I was looking for this information for my mission.

  6. hey there and thank you for your information – I have definitely picked up something new from right here. I did however expertise a few technical issues using this website, since I experienced to reload the website many times previous to I could get it to load correctly. I had been wondering if your web hosting is OK? Not that I am complaining, but slow loading instances times will often affect your placement in google and could damage your high quality score if advertising and marketing with Adwords. Well I am adding this RSS to my email and can look out for much more of your respective intriguing content. Ensure that you update this again soon..

  7. You can certainly see your expertise in the paintings you write. The world hopes for more passionate writers like you who aren’t afraid to mention how they believe. At all times go after your heart.

  8. Great blog! Is your theme custom made or did you download it from somewhere? A theme like yours with a few simple adjustements would really make my blog shine. Please let me know where you got your theme. Thanks

  9. Throughout this awesome scheme of things you’ll get a B- with regard to effort and hard work. Where you lost me personally ended up being on all the details. As they say, the devil is in the details… And that could not be more accurate right here. Having said that, allow me inform you precisely what did do the job. Your text can be quite engaging and this is possibly why I am taking the effort in order to opine. I do not really make it a regular habit of doing that. Next, although I can easily see a leaps in reasoning you make, I am definitely not sure of exactly how you seem to connect the points that make the conclusion. For the moment I will, no doubt subscribe to your position but trust in the future you link your dots better.

  10. Something else is that when looking for a good on the internet electronics store, look for web stores that are consistently updated, keeping up-to-date with the most recent products, the top deals, plus helpful information on products. This will ensure that you are doing business with a shop that really stays atop the competition and provides you what you should need to make educated, well-informed electronics buying. Thanks for the crucial tips I’ve learned from the blog.

Leave a Reply

Your email address will not be published. Required fields are marked *