Career Review

Where is my career going? What am I doing? Am i in the right direction ?

5G Wireless Standard Design Notes

Module 6 :  

Proportional Fair scheduling algorithms used in Base stations (Lower data rate users are artificially boosted to ensure they get access to the resources)

Module 7: 5G physical downlink shared channel (PDSCH) transmit chain– CRC generation

• Min Transport Block size 1RB = 24 bits MCS0 max Transport size = 319784, 275RB MCS27 
• A 24 bit CRC can detect upto and including 24 bit errors
• An Example of 2 bit CRC calculation given
• Physical layer starts with CRC and ends with CRC (38.212, section 5.1)

Module 8: 5G PDSCH transmit chain – code block segmentation – part I

Segment Size = 8448, + 24-bit CRC

   

LDPC Decoder/Encoder needs a higher number of bits for better coding gain i.,e it can perform better even with a low SNR. Larger the codeblock size, better will be the performance of the decoder. In the above pic example the SNR needed for 8448 bits is lower compared to SNR needed to decode 2848 bits, i.e., we are penalizing the guy with lower codeblock. BLER is limited by the smallest transport size.

On the other hand, a high number of bits (Segment size) can lead to a higher decoding implementation complexity.

Module 9: 5G PDSCH transmit chain – LDPC coding

In the u matrix, 2 means the colums of I need to be shifted by 2, 3 means colums of I need to be shifted by 3 etc., This is done so that we dont need to store entire H matrix (savings in space in systems). Instead given a U and a I and size, we can generate a H matrix.

5G PDSCH supports 2 base graphs

1.     Base Graph 1 optimized for large information block size and high code rates
1. max code rate 8/9 min code rate 1/3
2. Base Graph 2 optimized for small information block size and low code rates.
1. Lowest code rate is 1/5

Base Graph 2 has lower decoding complexity.

Kb - The number of columns in Systematic matrix is fixed. implementation constraint. therfore the number of rows = Information bits (i.e., 8448) /22 = 384. so summarize we ll have a 384 X 22 matrix.

Module 10: 5G PDSCH transmit chain – code block segmentation – part II

Career Tips - from Trip to Irvine

 This list is the collection of all of my discussions with many Colleagues at Irvine and the key things/wisdom that I got to learn and the things that I wish to remember & use it for life. 

Discussions with Girish basruru, Ben Hui, Eddy Soethja, Trinh Nguyen, Diep Nguyen

Lessons learnt from my stay in Irvine

 Lessons learnt from my stay in Irvine.

The general way of life as I saw it. The way how people go about their lives. My interactions with everybody - personal values of people at work, professionalism at work, random people on the streets, hotel staff, cleaning staff, people at tourist places, people at stores etc.,

Trip to Irvine

 My memiors of my work trip to Irvine. 

What are some of the memories of the places that I happened to like during my stay in Irvine. 

Life Goals - Evaluations

The past few weeks have given me some time to reflect & refine about my life goals. The stuff which would make me/us proud of if we were to accomplish this. This in a way also reflects the state of my mind or my journey as I envision at this point in time. Nevertheless as they say "Every man can only accomplish what he can set out to" . So these are the lists

Half Yearly Evaluations :

Life Financial Goals : Fixed and Freezed

    

Books ReadList - April-2024

 I am in Irvine, California, US from over a couple of months and have some spare time to reflect on my life -the most important questions i always ponder upon - personal life, quality of my life, quality of my thoughts, how i m spending my time, Am I doing it right? Am I enroute to be a good father? Am I enroute to be a good individual?? It struck as it always when I m adrift, that I have been to self indulgent in spending time with any random movies that I could lay my hand upon. It struck to how many books I have started lately but haven't had the commitment to finish. So i took a break from the movies and completed two books, I had carried with me for this trip. Also the fact that I was away from my family left me with a lot of time to fill up with something. So after watching a lot of movies (and a lot of work ) in the first half of my trip, I thought why not read a few books and see if I still feel reading books is fun :-) As it turns out, I had started to feel disconnected with myself, not being in tune with myself, confused about my thoughts , opinions etc., As it has happened almost always holding a book and internalizing the distilled knowledge by wisemen has helped me to keep my head in the right direction. And so this was just what I needed to do at this point.

The first one by Benny Aguiar about Rajiv Gandhis political ascension to the prime minister ship and the state of events which he was a witness to. Was a compelling read on several points - To enrich knowledge of events in not so distant past, to know about emergency, Assam peace accord, Punjab Peace accord and how it was all worked out. The reading about Indo-Srilanka and why he did what he did. The Good will with which he assumed office and how his thought process changed as he started becoming a seasoned politician. Also it struck me how each of these are very logical things any man (probably like me :-) ) would have taken, if I had been in his path and also somethings which were bold/blunders.. I liked that fact that I had a moment to put myself in that situation and think what I or anyone would have done so that I can understand/relate/criticize better :-)

   George Matthew Adams comes up with book in a very presentable format with one idea explained within 1 page with each page having a quotation either from Napolean Hill or someone worth reading. All the topics are timeless values worth reading or re-reading once in several years if not months. Thank you George Matthew Adams, Grateful for all the learning.

Started Another attempt at reading the Bible. I stumbled upon this as the hotel guys were generous enough to place one at every room. The last time I lay hands on a bible was several  years ago and I probably have forgot all the readings. so I m starting another attempt at reading this and the journey of reading both the old and new testament combined in a single edition is exciting (Now i m assuming that i ll finish one of them at least here :-) ). But nevertheless Its an opportunity to complete some readings and hope to pick up some learnings as i wade through it.