关于CC1310 FEC的问题

TI 工程师：

这里有两个问题：

1. 关于CC1310 的FEC ， 我在以下两个地方看到有不一样的回答。

https://e2echina.ti.com/question_answer/wireless_connectivity/hw_rf_proprietary/f/45/t/180946?keyMatch=CC1310%20FEC&tisearch=Search-CN-everything ：“FEC默认是开启的”

https://e2echina.ti.com/question_answer/wireless_connectivity/hw_rf_proprietary/f/45/p/163160/477626?keyMatch=CC1310%20FEC&tisearch=Search-CN-everything ： “CC1310没有FEC，不过可以用软件自己做”

2. CC1310有FEC吗？

如果有，在哪里开启的呢？ 与CC2500的FEC 相同吗？

如果没有，CC1310怎样与CC1101兼容通信呢?

谢谢！

Susan Yang：

1. What's the modulation scheme of HSM?

4mbps on CC1310 is 8FSK.
1.5mbps on CC1310 is 4FSK
1.0mbps on CC1310 is 2FSK
5.0mbps on CC2650 is 8FSK
2.0mbps on CC2650 is 2FSK
1.0mbps on CC2650 is 2FSK

2. Does HSM adopt channel coding? If so, then what scheme is used?

4mbps on CC1310 is coded using FEC and Viterbi decoder. The effective data rate is 4.0mbps the over-the-air is higher.
1.5mbps on CC1310 is un-coded
1.0mbps on CC1310 is un-coded
5.0mbps on CC2650 is is coded using FEC and Viterbi decoder. The effective data rate is 4.0mbps the over-the-air is higher.
2.0mbps on CC2650 is un-coded
1.0mbps on CC2650 is un-coded

3. How much overhead(includig syncword and preamble) is included in the HSM?

32 bits of preamble and 32 bits of sync word is required and this is transmitted in 2FSK mode only, so therefore it effectively becomes more bits in 4 and 8FSK.

4. Regarding the receiver sensitity, I have confirmed that the sensitivity level is -84dBm in this forum.

Yes, that is correct.

But I couldn't see the BER which resulted in -84dBm. I want to know the specification on the receiver sensitivity of HSM.

1% BER

5. Does TI support the HSM in RF studio? If so, I want to know the approximate schedule of the software release.

Not yet, but it will be included in an upcoming version. However the Patches required for TIRTOS to work at these data rates is included in the latest TI-RTOS bundle and the PER example code shows how to use it.

6. I heard that the 1.6Mbps example using 4FSK scheme is possilbe in this forum.

Yes, that is correct, but we have de-tuned it to run at 1.5mbps maximum. This is not released yet.

Susan Yang：

4 mbps PHY已经实现FEC，因此您不能通过任何方式打开/关闭或配置它。

yan mo：

回复 Susan Yang:

请问下CC1310 “5 kbps, Simple Link Long Range (Mode 2). 20 ksps, DSSS = 2” LRM， 有实现FEC吗？ FEC 配置与CC2500相同（之前有使用CC2500FEC）？谢谢

yan mo：

回复 yan mo:

有没有关于CC1310 FEC 相关的介绍呢？有看到一篇Design Note DN50，但没有看到有包含CC1310。谢谢

Susan Yang：

回复 yan mo:

这方面确实不太多，您可以看一下下面的链接

这个是与CC1101上使用的FEC兼容的FEC补丁

dev.ti.com/…/cc1101-migration.html