![]() Symbols/Second = 1200 x 14 x 1000 = 16,800,000 Symbols/SecondĬonsidering 64-QAM as highest modulation for downlink each symbol can carries 6 bits provide raw data rate as follows:.Spectral efficiency= 13 x 10^6 / 2 x 10^6 = 6.5 bits/second/HzĪn LTE system can support a maximum channel bandwidth as 20 MHz (Not including Carrier Aggregation).Spectral efficiency = net data rate in bps / Channel Bandwidth in Hzįor example, a system uses channel bandwidth as 2 MHz and it can support a raw data rate of say 15 Mbps, assuming 2 Mbps as overhead then net date rate will be as 13 Mpbs, then its spectrum efficient can be calculated as follows:.net data rate = raw data rate – overhead.Spectral efficiency is usually expressed as “bits per second per hertz,” or bits/s/Hz, defined as the net data rate in bits per second (bps) divided by the bandwidth in hertz. Net data rate and symbol rate are related to the raw data rate which includes the usable payload and all overhead. There is a hard limit to how much data can be transmitted in a given bandwidth – this limit is well-known as the Shannon-Hartley Theorem and commonly referred to as the Shannon limit. ![]() Spectral efficiency is an important consideration for 5G-NR radios, as it was for 4G/LTE: The amount of information that fits in a given channel bandwidth or one just say how efficiently can that piece of spectrum be used to transmit information.
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