Forums

Why is Logical root sequence number in Root Zadoff-Chu needed?

Started by guyholtzman 6 months ago7 replieslatest reply 6 months ago203 views
Hi,I have been investigating RACH preamble planning and the properties of Root Zadoff-Chu sequences as used in 3GPP #LTE .From Wikipedia, Zadoff-Chu sequences have...

LTE Uplink transmit

Started by Sharan123 2 years ago4 replieslatest reply 2 years ago97 views
We know that in #LTE downlink transmit uses #OFDM but in case of uplink transmit, OFDM scheme is not used. Can someone explain the reason behind this?

Sampling frequency in Baseband

Started by Sharan123 3 years ago15 replieslatest reply 2 years ago1539 views
I would like to know importance of sampling frequency in the baseband. I am using #LTE as an example.If we take a 20 MHz system, the sampling frequency is specified...

Source coding in WiFi or LTE

Started by Sharan123 3 years ago7 replieslatest reply 3 years ago486 views
Hi,I am interested to know what source coding method is used in case of #WiFi or #LTE. I assume Turbo coding or LDPC are used for channel coding.Thanks,

LTE concept of TTI

Started by Sharan123 3 years ago615 views
Hello All,The concept of TTI in #LTE has always confused me. I am giving a brief understanding from a base station perspective.So, assuming BW is fixed (e.g. 20...

LTE power allocation

Started by Sharan123 3 years ago3 replieslatest reply 3 years ago212 views
Hello All,In case of #LTE, it is mentioned (http://www.sharetechnote.com/html/Handbook_LTE_Dow...) that control channels are made strong wrt to other channels. This...

LTE - concept of layer mapping

Started by Sharan123 3 years ago4 replieslatest reply 3 years ago3835 views
I am interested to conceptually understand the layer mapping stage in #LTE downlink processing.While all the literature clearly describe how the layer mapping is...

LTE Downlink TX understanding

Started by Sharan123 3 years ago9 replieslatest reply 3 years ago753 views
Hello All,I would like to get some clarification wrt to the #LTE downlink process at the Basestation side.I am using a 20 MHz system to be specific in my questions.It...

Pass band in digital up conversion of LTE signals

Started by LabPe43 3 years ago6 replieslatest reply 3 years ago262 views
Hi,I am new to filters and DUC (digital up conversion). I was reading an article from xilinx regarding DUC.It was using a passband of 9.015 MHz in its first stage...

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