विधियों की तुलना करें
चुनी हुई विधियों की आमने-सामने समीक्षा करें; भिन्नता वाली पंक्तियाँ रेखांकित हैं।
| मल्टीपल-इनपुट मल्टीपल-आउटपुट (MIMO)× | स्लॉटेड अलोहा रैंडम एक्सेस प्रोटोकॉल× | |
|---|---|---|
| क्षेत्र | दूरसंचार | दूरसंचार |
| परिवार | Process / pipeline | Process / pipeline |
| उद्भव वर्ष≠ | 1995 | 1970 |
| प्रवर्तक≠ | Telatar, Foschini, and Gans | Norman Abramson and Lawrence Roberts |
| प्रकार≠ | spatial multiplexing technique | random access protocol |
| मौलिक स्रोत≠ | Telatar, I. (1999). Capacity of multi-antenna Gaussian channels. European Transactions on Telecommunications, 10(6), 585-595. DOI ↗ | Roberts, L. G. (1975). ALOHA packet system with and without slots and capture. ACM SIGCOMM Computer Communication Review, 5(2), 28-42. DOI ↗ |
| उपनाम | spatial multiplexing, antenna diversity | random access, medium access |
| संबंधित≠ | 5 | 3 |
| सारांश≠ | MIMO is a technique that uses multiple transmit and receive antennas to significantly increase channel capacity and reliability. Pioneered theoretically by Telatar (1999) and Foschini & Gans (1998), MIMO exploits multipath propagation—typically a liability in wireless—as an asset by creating independent spatial channels. It is now fundamental to all modern wireless systems including LTE, WiFi-6, and 5G, where it provides both capacity gains through spatial multiplexing and robustness through diversity. | Slotted ALOHA is a fundamental random access protocol enabling multiple devices to share a wireless channel without centralized coordination. Introduced by Abramson (1970) and refined by Roberts (1975), it divides time into fixed slots and allows devices to transmit at the beginning of a slot with a fixed probability. While simple and elegant, Slotted ALOHA achieves only 37% channel utilization under saturation (optimal traffic load), a fundamental limit discovered by Abramson. Despite this limitation, Slotted ALOHA remains a teaching tool and appears in modern systems like satellite and IoT networks. |
| ScholarGateडेटासेट ↗ |
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