While writing code based on OFDM using python, we have to follow all the information and they are highlighted in this article. To begin with, we have highlighted the short note based on OFDM python in the following.
OFDM in Python
Orthogonal frequency division multiplexing is abbreviated as OFDM and it is the multicarrier system which is applied in a wide range of wireless transmission systems such as LTE, WiMAX and DVB-T and DAB. In addition, to perform the OFDM based communication process, python use the blocks that are mentioned in the following.
- Channel Estimate
- Cyclic prefix (CP)
OFDM Code using Python
Here, we have highlighted the python code to define some index sets that describe which carriers transmit pilots and which carriers contain payload.
allCarriers = np.arange(K)
pilotCarriers = allCarriers[::K//P]
pilotCarriers = np.hstack([pilotCarriers, np.array([allCarriers[-1]])])
P = P+1
dataCarriers = np.delete(allCarriers, pilotCarriers)
plt.plot(pilotCarriers, np.zeros_like(pilotCarriers), ‘bo’, label=’pilot’)
plt.plot(dataCarriers, np.zeros_like(dataCarriers), ‘ro’, label=’data’)
In addition, the python code to define the wireless channel between transmitter and receiver are highlighted below.
channelResponse = np.array([1, 0, 0.3+0.3j])
H_exact = np.fft.fft(channelResponse, K)
SNRdb = 25
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