channel frequency matters also because due to the physics of electromagnetic propatation, the higher the frequency the higher the signal loss, so based on the Shanon channel capacity law, higher signal losses result in lower SNR, so higher frequencies, too, result in less throughput and less range.
the throughput vs. channel width is explained by modulation. the wider the band, the higher the data rates can be. you really need to get into the modulation theory to undrstand why wider bandwidth results in higher throughput, so look at any modulation starting with AM, FM, PSQ, QPSK, QAM, etc. for symbol rate vs. channel width concept.
As a follow up to joe_hufford: Is there a resource that clearly explains differences in the channel width 20 vs 40 and 80, 80+80 and 160 MHz as well as the numbers shown in slide 8 and what produces one stream in the other standards while the n-standard can use multiple streams because of MIMO technology?
shanon law governs channel capacity. channel capacity is a function of distance, bandwidth and SNR. for MIMO systems channel capacity is also a funciton of correlation - the lower the correlation among the MIMO antennas and paths the higher the capacity of the channel.
Typically the higher the frequency the higher the path loss through air and through obstrucitons like walls. That's why 900 MHz is preferable for long distance communications and for penetrating through buildings, whereas 2.4 GHz and 5 GHz technologies exhibit significantly less range and higher losses through walls. 60 GHz is much higher frequency, so almost no signal penetrates through walls and even in the air the losses are quite high.
MiMO can speed up the system or make it more redundant, depending of making different threads of sending the same data and hoping it arribes through one carrier. What is the decision to use more or less?
For the 60MHz band, do you know whet effects have the thin walls on a house?
Thank u very much! Im thinking&developing a musical project that could end up into a wireless networked (collaborative creation) adapted musical instrument for developing people´s sensitivity while expressing themselves and having fun
802.11P - Is there linking between the satelite and this wireless comm? And security is obviously and issue... For future installation, is the a partitioning scheme to keep a wall between operations of the main auto control system with the wireless communication?
LTE and LTE Advanced use OFDM. I know that OFDM has multi-tones overlapped with certain bandwidth. I real world, how they look like on spectrum? For example, if I initiate a call, I can see a band of PSD on frequency domain? Like trapezoid?
A Book For All Reasons Bernard Cole1 Comment Robert Oshana's recent book "Software Engineering for Embedded Systems (Newnes/Elsevier)," written and edited with Mark Kraeling, is a 'book for all reasons.' At almost 1,200 pages, it ...