What is puncturing in 5G?
From Wikipedia, the free encyclopedia. In coding theory, puncturing is the process of removing some of the parity bits after encoding with an error-correction code. This has the same effect as encoding with an error-correction code with a higher rate, or less redundancy.
Why LDPC for 5G?
As a coding scheme for data, 5G LDPC codes are designed to support high throughput, a variable code rate and length and hybrid automatic repeat request in addition to good error correcting capability.
What coding is used in 5G?
To fulfill 5G communications requirements, we use LDPC and Polar codes for error correction. In 5G NR (New Radio) LDPC codes used for the data channel and control channel Polar Codes are used. We get high Coding gain for this code. It has several features such as high throughput, low power dissipation, and low latency.
Which codes are used for channel coding in NR?
Polar coding is used for PBCH, PDCCH and PUCCH where as LDPC (Low Density Parity Check) is used for PDSCH and PUSCH….5G NR Channel Coding | Coding techniques for 5G NR Channels.
| Traffic Channel/Control Information | Coding Techniques |
|---|---|
| PCH (carried by PDSCH) | LDPC |
What is rate matching and puncturing?
Puncturing is a typical way of applying the rate matching. In puncturing, the mother code length N is longer than the rate matching output size E, and some coded outputs are not transmitted to meet the rate matching output size. One can view puncturing scheme as the way how non-transmitted positions are selected.
What are QC LDPC codes?
Quasi-cyclic (QC) low-density parity-check (LDPC) codes which are known as QC-LDPC codes, have many applications due to their simple encoding implementation by means of cyclic shift registers.
Where is LDPC used?
LDPC codes are also used for 10GBASE-T Ethernet, which sends data at 10 gigabits per second over twisted-pair cables. As of 2009, LDPC codes are also part of the Wi-Fi 802.11 standard as an optional part of 802.11n and 802.11ac, in the High Throughput (HT) PHY specification.
What is channel coding in LTE?
Channel Coding is a method to replace ‘original data bits’ with ‘some other bits (normally longer than the original bits)’. For example, the simplest coding would be as follows : 0 –> 0000 : replace all ‘1’ in orginal data into ‘0000’ 1 –> 1111 : replace all ‘1’ in orginal data into ‘1111’
What gains can be realized by massive MIMO of 5G?
Benefits of Massive MIMO for 5G Networks and Beyond Spectral Efficiency: Massive MIMO provides higher spectral efficiency by allowing its antenna array to focus narrow beams towards a user. Spectral efficiency more than ten times better than the current MIMO system used for 4G/LTE can be achieved.
What is redundancy version in 5G NR?
Similar to 4G, HARQ operation and the corresponding rate matching operation of 5G LDPC codes is controlled by redundancy version (rv) from 0 to 3. Each redundancy version corresponds to a certain column position of the base graph which divides the base graph excluding punctured two columns into four chunks.