The spelling of the word "NOHL" corresponds to its pronunciation in IPA as /noʊl/. The first sound, "n", is pronounced with the tip of the tongue touching the alveolar ridge. The second sound is the diphthong "oʊ", which is pronounced by rounding the lips and moving the tongue from a mid position to a high back position. Finally, the sound "l" is pronounced by touching the tongue to the alveolar ridge and making a voiced sound. Together, these sounds spell out the word "NOHL".
NOHL stands for Non-Orthogonal Hopping and Listen. It is a term commonly used in wireless communication systems, particularly in the context of Long Term Evolution (LTE) technology. NOHL refers to a mechanism designed to improve the efficiency and performance of the system by reducing the interference caused by simultaneous transmissions.
In LTE networks, multiple users can access the wireless channel at the same time, which can lead to interference issues. NOHL addresses this problem by allowing a user to switch between two neighboring frequency channels within a specific time period. The hopping technique employed in NOHL ensures that the user's signal does not interfere with other ongoing transmissions.
The "non-orthogonal" aspect of NOHL means that the hopping does not follow a fixed pattern but instead dynamically adapts to the local conditions of the wireless channel. This adaptability helps in optimizing the overall system capacity and achieving better signal quality.
Furthermore, the "listen" feature in NOHL refers to the periodic monitoring of the shared channel by the user to detect any ongoing transmissions. By listening to the channel, the user can avoid interfering with other users who may already be transmitting. This enhances the fairness of resource allocation and reduces collisions between users.
Overall, NOHL is a technique employed in wireless communication systems, allowing users to hop between frequency channels and listen to the channel before transmitting. This helps in reducing interference, optimizing system capacity, and improving the overall performance of the network.