linkadaptie

Linkadaptie (English: link adaptation) is a concept in wireless telecommunications that describes the process of adjusting transmission parameters on a per-link basis in response to changing channel conditions. The goal is to maximize data throughput while maintaining a target level of reliability. In practice, linkadaptie is realized through adaptive modulation and coding (AMC), along with adjustable transmit power and, in multicarrier systems, per-subcarrier or per-subband adaptation.

Receivers estimate channel quality, typically via signal-to-noise ratio or other metrics, and feed this information back to the transmitter. The transmitter then selects an appropriate modulation order (for example, BPSK, QPSK, 16QAM, 64QAM), coding rate, and, if applicable, power level. The result is a higher-order, more efficient transmission under good conditions and a simpler, more robust scheme during fading or interference.

Commonly used in cellular networks (LTE, 5G NR), Wi-Fi, and broadcast systems, linkadaptie improves spectral efficiency and can extend battery life by avoiding unnecessary high-power transmissions. Challenges include the overhead and latency of channel state information feedback, estimation errors, rapidly changing channels (high mobility), and the complexity of coordinating adaptation across multiple antennas or subcarriers.

In summary, linkadaptie enables wireless systems to respond to the dynamic radio environment, balancing throughput, reliability, and power efficiency through adaptive parameter selection.