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2 votes
Accepted

LTE PSS Channel Estimation for coarse SSS Equalization

Every 5 ms it is sent an OFDM Symbol which carries a PSS. So by using the block based channel estimation it might be possible to interpolate these PSS channel responses over time to get a $ h_{x_u}(f,...
AlexTP's user avatar
  • 6,595
2 votes

What is use of Quadrature Converter in OFDM?

In OFDM, the output of DAC after IFFT is a complex analog signal. In order to transmit this complex signal, two orthogonal RF channels are needed, one to transmit the real part, another one to ...
user295357's user avatar
1 vote

What is use of Quadrature Converter in OFDM?

"Mixing" has a different meaning for RF than it does for audio. In audio mixing is a linear combination of the two (or more) signals. In RF, it's the modulation that bumps a baseband signal ...
robert bristow-johnson's user avatar
1 vote
Accepted

CFO limit for correct LTE Zadoff-Chu Synchronization

The CFO estimation range is defined by the length of your correlation sequence, such that: $f_{est} = +/- 1/T$, where $T$ is the length of your sequence in time. Rewritten another way: $f_{est}= +/- ...
BigBrownBear00's user avatar
1 vote
Accepted

Raw BER or Uncoded BER in LTE/5G

Well, that depends on what you want to do with things. You typically see uncoded BER in observations of the behaviour of the physical layer transmission (because there, it is a good benchmark for how ...
Marcus Müller's user avatar
1 vote

OFDM Signal and IQ Paths

@Reddi Suresh Denote the received RF signal as $r(t)$. In the receiver, do following three things for down-converting and recovering $i(t)$ and $q(t)$. (1) Multiply $r(t)$ with $2cos(\omega_0t)$, that ...
user295357's user avatar

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