How to calculate no of bits/bytes can be transfered in one resource block? and parameters should consider?

Question

I need help in MATLAB coding. I am working on resource allocation in LTE. Can someone help me in coding. I am not getting a point how to allocate resource blocks to the user at downlink and what parameters should I consider.
If I am having system BW 15 MHz, the number of resource blocks will be 75. I have 25 small cells and random user. Now I have to allocate these resource blocks among small cell users.

Kindly help me how should I code?

Answer 1

Hi,

As you we are aware that RB is made out 12 subcarrier and 6 or 7 Symbols based on Cyclic Prefix.

i.e 12 * 7 =84 Resource Element for short Cyclic Prefix
12*6 = 72 Resource Element for Long Cyclic Prefix

So , Assuming Short Cyclic Prefix= 7 Symbols
16 QAM = 4 bits

for short cyclic Prefix= 84 Resource element
So no. of Resource element = 12*7=84
total no. of bits
84 * 4= 336 bits (as we have assumed 16 QAM)

The parameters we consider are

1. Cyclic Prefix
2. Modulation Scheme.

Answer 2

Hi,

Only MCS is enough is to calculate no of bits per RB. 3Gpp spec says each MCS will have corresponding TBS(36.213 - 7.1.7.1) then each TBS and no of RB will have corresponding Bytes(36.213 -7.1.7.2.1 ) can send.