Alamouti‑Ordered Sub‑Packet HARQ for MIMO (Method and apparatus for ordering retransmissions in an NxM MIMO system, Tech ID: 05‑052)
Technology Overview: A MIMO HARQ method where a transmitter splits a coded stream into N sub‑packets for N transmit antennas, while the receiver independently decodes across M receive antennas. Upon a NACK, the transmitter orders the next retransmission using an Alamouti‑based scheme, improving the likelihood of successful combining/decoding on subsequent attempts.
Industry Pain Point: Standard MIMO retransmissions may not optimally exploit space‑time diversity across sub‑packets, causing throughput loss under fading and interference.
NJIT Solution: Apply ordered, Alamouti‑structured retransmissions that capitalize on spatial diversity for the sub‑packets most in need, accelerating convergence of HARQ in challenging channels.
Key Features & Advantages
- Sub‑packet–level HARQ ordering with Alamouti space‑time coding.
- Improved link reliability/throughput without additional UE antennas.
- Applicable to N×M MIMO across multiple standards and bands.
Development Stage: TRL 3–4 – Algorithm/protocol with issued patent embodiments.
Target Markets
- Cellular modem IP (chipsets/baseband stacks)
- Wireless backhaul/radio links using MIMO HARQ
- Defense and private‑LTE/5G radios
Commercial & IP Details
Inventors: Yeheskel Bar‑Ness; Dong‑Ho Kim; Ye‑Hoon Lee; Guillem Malagarriga