Patent · US Active

Hybrid-ARQ (HARQ) with scrambler

US8392781B2 · kind B2 · utility

8Cited by

8References

7Claims

0Family size

Assignee

TEXAS INSTRUMENTS INCORPORATED · US

Inventors

Anuj Batra · Dallas, US
Deric Wayne Waters · Dallas, US
Srinath Hosur · Plano, US

Key dates

Filing date	Jan 13, 2010
Grant date	Mar 5, 2013
Priority date	—
Expiry date	Jun 14, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04L1/188
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Embodiments of the invention provide a system and method of hybrid automatic repeat-request (HARQ) processing. A viterbi decoder is coupled to and follows a descrambler. After the signal has been de-scrambled, it can be stored in a memory in case it needs to be recombined with another packet. This means that the log-likelihood ratios LLRs for each transmitted bit are stored in memory using a finite number of bits (for example, between 4 and 12 bits). If the packet that is currently being processed contains retransmitted information, then the de-scrambled output stored from a previous packet containing the same information can be loaded and combined with the current packet.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.